Dissertations / Theses on the topic 'Perovskite Solar Cells Hybrid perovskites'
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Bouich, Amal. "Study and Characterization of Hybrid Perovskites and Copper-Indium-Gallium Selenide thin films for Tandem Solar Cells." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/160621.
Full text[EN] The thesis work presented is part of the work in the Laboratory of New Materials for Photovoltaic Energy in the main target to use low cost techniques for elaboration of Perovskite and Copper, indium, gallium, and selenium CIGS materials for photovoltaic application. Organic-inorganic lead halides perovskites have currently and exceptionally appeared as new materials for low cost thin film solar cells specially that the efficiency of perovskite based solar cell have jumped from 3.8% to 22.7% in short time.in other hand, CIGS solar cells record 23.35% efficiency and still can be boosted. Here, we report the elaboration and characterization of CIGS as well as methylammonium lead iodide perovskites MAPbI3 and formamidinuim iodide lead iodide perovskites FAPbI3 absorbers for perovskite-based solar cells and Tandem Perovskites/ CIGS. The thin films prepared were characterized by X-ray diffraction (XRD), Raman spectroscopy (RS), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis, atomic force microscopy (AFM), transmission electron microscopy (TEM), Photoluminescence analysis (PL) and UV-Vis spectroscopy. The first stage was devoted for the effect of different parameters on the growth of CIGS by electrodeposition and we investigate the impact of different back contact in structural and optical proprieties. In a second stage, we report the growth of CIGS films by spray pyrolysis, we studied the effect of experimental parameter also the annealing process which is the key factor for improving the performance of solar cells,subsequently we elaborated different films constituted CdZnS/CdS/CIGS/Mo solar cells, the approach is to change the toxic ZnO by using a transparent, conductive CdZnS layer. In other hand, MAPbI3 film was investigated in order to optimize the chemical composition and to study the crystallization process also to get sight about the stability of perovskite materials to meet the requirement of their application as an active layer in perovskite solar cell. For this purpose. the MAPbI3 film surface was treated by adding diethyl ether antisolvent with different rates. during the treatment complex exchanges are appearing at the same time under the influence of quite a lot of physicochemical properties. A whole understanding of this topic is critically important for improving solar cell performance. MAPbI3 doped by the tetrabutylammonium TBA is boosting the formation of perovskite structure, leading to a higher orientation along the (110) and shows better crystallinity, large grain size, pinhole-free, which is suitable for the manufacturing of the optoelectronic devices with higher performance. Also, we have identified the impact of TBA in the photo-physical properties, we have noticed that the TBA improve the photoluminescence emission by reducing the density of trap states and the optical absorption indicates a significant shift to the lower wavelength and optical bandgap varied from 1.8 to 1.52 eV. Finally, the stability was explored for 5% TBA, it found that after 15 days the stability remained excellent in relative humidity of ~60%. These results would be helpful for realizing stable and high performance MAPbI3-based devices. Furthermore, we inspect the effect of monovalent cation substitution of Guanidinium (GA) on the structural and optical properties of FAPbI3 thin films perovskites. The ratio between the desirable a-phase and the undesirable y yellow phase is studied as a function of GA content. GA doping is shown to be efficient in the control of a/y phases ratio and then in the stabilization of the a-FaPbI3 phase. We qualitatively evaluate the impact of 10% of guanidinium on the phase composition and microstructure of films. The results show that an adequate amount of 10% GA:FaPbI3 leads to a homogeneous perovskite film with stable a phase, large grains, and free pinholes. 10% GA: FaPbI3 films demonstrate excellent stability after aging for 15 days in relative humidity of~60%.
[CA] L'objectiu principal d'aquesta tesi és contribuir a l'avanç de noves tècniques d'elaboració de baix cost, fent servir materials d'aliatges del tipus de coure, indi, gal·li i seleni (CIGS) i perovskites, per a aplicacions en energia solar fotovoltaica. El CIGS sembla ser adequat ja que són de baix cost de producció i s'han reportat eficiències de conversió del 23,35%. D'altra banda, les perovskites híbrides d'halurs de plom orgànics-inorgànics han aparegut com a nous materials excepcionals per cel·les solars, especialment perquè l'eficiència de les cel·les solars basades en perovskites ha augmentat del 3.8% al 22.7% en menys d'un lustre. En el present treball, reportem l'elaboració i caracterització de CIGS y de perovskitas de iodur de plom de metilamoni (MAPbI3) i de iodur de plom de formamidini (FaPbI3) per a les cèl·lules solars de CIGS i tàndem Perovskites/CIGS. En les capes de CIGS dipositades per electrodeposició es va investigar l'efecte dels diferents paràmetres sobre el procés d'electrodeposició, així com l'efecte del contacte posterior sobre les propietats estructurals i òptiques del CIGS. Ens trobem que el tipus de contacte posterior té un efecte significatiu en la posterior interpretació de pel·lícules primes CIGS. A més, vam estudiar la tècnica de polvorització de la piròlisi per produir pel·lícules de CIGS. Es va estudiar el procés de recuit, que és el factor clau per millorar el rendiment de les cèl·lules solars. Es van produir diferents pel·lícules fines formades pel nostre dispositiu CdZnS/CdS/CIGS/Mo que utilitzaven una capa conductiva CdZnS transparent per minimitzar l'alineació de la interfície. D'altra banda, es van investigar perovskites MAPbI3, amb la finalitat d'optimitzar la composició química i estudiar el procés de cristal·lització també per a conèixer l'estabilitat dels materials de perovskita. la cristal·lització s'aconsegueix alentint la solubilitat en una solució saturada mitjançant l'addició d'una quantitat diferent de l'antisolvent d'èter dietílic. Durant el tractament apareixen al mateix temps intercanvis complexos sota la influència de moltes propietats fisicoquímiques. Una comprensió completa d'aquest tema és de vital importància per a millorar el rendiment. Amb l'objectiu principal d'augmentar l'estabilitat de MAPbI3, el tetrabutilamoni (TBA) es pot incorporar a MAPbI3, impulsant la formació de l'estructura de perovskita, la qual cosa porta a una major orientació al llarg de (110). MAPbI3 dopades amb TBA presenten una millora de la cristalinitat, major grandària, la qual cosa és adequada per a la fabricació de dispositius optoelectròniques de major rendiment. A més, hem identificat l'impacte de TBA en les propietats foto físiques de MAPbI3. Hem notat que el dopatge amb TBA millora tant l'emissió de la fotoluminiscència en reduir la densitat dels estats de trampes com l'absorció òptica on apareix un canvi significatiu de la banda òptica prohibida cap a longituds d'ona més llargues que significa disminuir l'energia del gap, que va variar de 1.8 a 1.52 eV. Finalment, es va explorar l'estabilitat per les perovsquites dopades amb 5%TBA. Es va trobar que després de 15 dies l'estabilitat romania excel·lent en un humitat de 60%. A més, hem estudiat FAPbI3 com un dels materials de perovskita més atractius. Hem investigat l'efecte de la substitució de guanidini (GA) sobre les propietats estructurals i òptiques de FAPbI3. La relació entre la fase a de perovskita desitjable i la fase indesitjable y es va estudiar en funció del contingut de GA. Es mostra que el dopatge amb GA és eficaç en el control de la relació de fases a /y i després en l'estabilització de la fase a-FaPbI3. Els resultats mostren que una quantitat adequada de 10% GA condueix a una pel·lícula homogènia amb fase a estable, grans grans lliures de porus i forats. Les pel·lícules de 10% GA:FaPbI3 demostraren una excel·lent estabilitat després de l'envelliment durant 15 dies en un ambient humit (humitat relativa de 60%).
Bouich, A. (2020). Study and Characterization of Hybrid Perovskites and Copper-Indium-Gallium Selenide thin films for Tandem Solar Cells [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/160621
TESIS
Tainter, Gregory Demaray. "Spatially resolved charge transport and recombination in metal-halide perovskite films and solar cells." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/286026.
Full textDiab, Hiba. "Propriétés optiques des pérovskites hybrides 3D pour le photovoltaique." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLN061/document.
Full textIn the last five years, hybrid organic-inorganic perovskites have emerged as a novel class of semiconductors owing to their interesting electronic and optical properties for photovoltaic and light-emitting devices. This thesis reports an experimental study using optical spectroscopy to explore the optical properties and excitonic effects of hybrid perovskites such as CH3NH3PbX3 with X = I or Br.We studied the optical properties of spin-coated thin films and solution processed single crystals. Thin films present a granular structure and a high density of defects which induce a great variability of the optical properties. The study of single crystals allows us to highlight the intrinsic properties of material: free exciton emission, electron-phonon coupling and charge carriers recombination dynamics. Besides, we have investigated the impact of the orthorhombic-tetragonal phase transition on the optical properties of CH3NH3PbI3. Finally, we have quantified the effect of reabsorption on the emission properties of hybrid perovskites. The accurate estimate of this effect is particularly important for the interpretation of the optical properties of hybrid perovskites and explains the great heterogeneity of the results in the literature
Dindault, Chloe. "Development of coevaporated hybrid perovskite thin films for solar cells applications." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX079/document.
Full textHybrid perovskites celebrate this year their 10-year anniversary in the photovoltaic field. Besides the unprecedented rise in solar cells efficiencies, perovskite materials have tunable optical properties and can be manufactured at low cost, making them very promising candidates for the high efficiency, multijunction solar cells strategy. Perovskite crystal structure offers a relative degree of freedom, allowing the partial integration of multiple cations and halide ions. This chemical composition tuning translates into a bandgap tuning. Through fine chemical engineering, the 1.7 eV requirement for a c-Si-based tandem device can be achieved. Perovskite thin films can be prepared by a large variety of deposition techniques, from low cost precursors (CH3NH3I and PbI2 for instance), through low-temperature processes. While most of the reported works on perovskite thin films are based on the basic wet-process spincoating technique, this latter hardly allows large scale, homogeneous and reproducible deposition. With the future challenge of industrialization and the increasing interest for the Silicon/Perovskite tandem approach, solvent-free methods appear more suitable. Already widely implemented in the OLED industry, coevaporation stands as a viable option for perovskites’ future. Reported for the first time in 2013, coevaporated perovskites are still scarcely studied compared to wet-based techniques, requiring more expensive set ups. In the present thesis, we implemented and developed the coevaporation process to fabricate perovskite thin films for solar cells applications.Starting off on a proof-of-concept reactor to assess the feasibility of the technique, we got accustomed to the perovskite precursors behaviour and identify very early on the organic precursor to be hardly manageable, as reported in the literature. In six months, we were nonetheless able to obtain nice perovskite films leading to 9% efficient photovoltaic devices, unfortunately with a poor reproducibility that we think to be partially due to the cloud vapour behaviour of CH3NH3I. We eventually found ourselves missing some features on the equipment, preventing us from accurately get a grasp on the process. From this feedback we then designed, hand in hand with the manufacturer, a dedicated semi-industrial equipment for perovskite coevaporation. Following its implementation, we then focused on establishing the reproducibility of the method, trying to mitigate the parasitic effect of the organic compound. Even though the efficiencies in solar cells were still slightly lower for coevaporated perovskites, with respect to classical spincoated ones, we expected the material homogeneity to be in favour of the vacuum-based process. We then eventually integrated to this thesis a comparative study between wet- and dry-processed perovskite films using a Synchrotron-based X-ray spectromicroscopy technique
Cacovich, Stefania. "Electron microscopy studies of hybrid perovskite solar cells." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/276753.
Full textNoel, Nakita K. "Advances in hybrid solar cells : from dye-sensitised to perovskite solar cells." Thesis, University of Oxford, 2014. https://ora.ox.ac.uk/objects/uuid:e0f54943-546a-49cd-8fd9-5ff07ec7bf0a.
Full textNgqoloda, Siphelo. "Hybrid lead halide perovskite thin films and solar cells by chemical vapour deposition." University of the Western Cape, 2021. http://hdl.handle.net/11394/8344.
Full textThe organic-inorganic hybrid perovskites such as methyl ammonium lead iodide (MAPbI3) or mixed halide MAPbI3-xClx (x is usually very small) have emerged as an interesting class of semiconductor materials for their application in photovoltaic (PV) and other semiconducting devices. A fast rise in PCE of this material observed in just under a decade from 3.8% in 2009 to over 25.2% recently is highly unique compared to other established PV technologies such as c-Si, GaAs, and CdTe. The high efficiency of perovskites solar cells has been attributed to its excellent optical and electronic properties. Perovskites thin film solar cells are usually deposited via spin coating, vacuum thermal evaporation, and chemical vapour deposition (CVD).
Liu, Tianyu. "Perovskite Solar Cells fabrication and Azobenzene Perovskite synthesis: a study in understanding organic-inorganic hybrid lead halide perovskite." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1576840261464488.
Full textLee, Heejae. "Analysis of Current-Voltage Hysteresis and Ageing Characteristics for CH3NH3PbI3-xClxBased Perovskite Thin Film Solar Cells." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX009/document.
Full textOrganic-inorganic lead halide perovskites are very promising materials for the next generation of solar cells with intrinsic advantages such as a low-cost material due to the availability of source materials and low-temperature solution processing as well as a high power conversion efficiency of the sunlight. However, perovskite solar cells are still unstable and show deleterious current-voltage hysteresis effects. Inthis thesis, analyses of CH3NH3PbI3-xClx based perovskite thin films and solar cells are presented. The electrical transport characteristics and the ageing processes are investigated using different approaches.The synthesis of the halide perovskite materials is optimized in a first step by controlling the deposition conditions such as annealing temperature (80°C) and spinning rate (6000 rpm) in the one step-spin-casted process. CH3NH3PbI3-xClx based perovskite solar cells are then fabricated in the inverted planar structure and characterized optically and electrically in a second step.Direct experimental evidence of the motion of the halide ions under an applied voltage has been observed using glow discharge optical emission spectroscopy (GDOES). Ionic diffusion length of 140 nm and ratio of mobile iodide ions of 65 % have been deduced. It is shown that the current-voltage hysteresis in the dark is strongly affected by the halide migration which causes a substantial screening of the applied electric field. Thus we have found a shift of voltage at zero current (< 0.25 V) and a leakage current (< 0.1 mA/cm2) in the dark versus measurement condition. Through the current-voltage curves as a function of temperature we have identified the freezing temperature of the mobile iodides at 260K. Using the Nernst-Einstein equation we have deduced a value of 0.253 eV for the activation energy of the mobile ions.Finally, the ageing process of the solar cell has been investigated with optical and electrical measurements. We deduced that the ageing process appear at first at the perovskite grain surface and boundaries. The electrical characteristics are degraded through a deterioration of the silver top-electrode due to the diffusion of iodides toward the silver as shown by GDOES analysis
Sarvari, Hojjatollah. "FABRICATION AND CHARACTERIZATION OF ORGANIC-INORGANIC HYBRID PEROVSKITE SOLAR CELLS." UKnowledge, 2018. https://uknowledge.uky.edu/ece_etds/123.
Full textSapori, Daniel. "Hybrid Perovskites : Fundamental properties and solar cell thin film technology." Thesis, Rennes, INSA, 2018. http://www.theses.fr/2018ISAR0017.
Full textIn the future, the world has to face up to major challenges: increasing the energy production, reducing the environmental impact, moving towards sustainability in energy, etc. Renewable energies such as photovoltaics can meet these challenges. This thesis concerns hybrid halide perovskite materials and their use in solar cells. These materials have recently attracted a lot of attention owing to their direct bandgaps, strong light absorption, large carrier diffusion lengths, tunable optoelectronic properties, and their facile and low-cost fabrication In few years, their energy conversion efficiency has rapidly increased from 3.8 % in 2009 to 22.7 % in 2017, hence approaching efficiencies of crystalline silicon based-devices which represent 90% of commercial photovoltaic cells. In the design of perovskite cells, the perovskite photoabsorber is generally sandwiched by two interfacial layers that yield selective charge collections: the hole and electron transport layers (HTM and ETM). Good quality and adapted interfacial layers are required to obtained high efficiency cells. In this thesis, both the perovskite material and the interfacial layers are investigated
Jiang, Yuanyuan. "Scalable Fabrication of High Efficiency Hybrid Perovskite Solar Cells by Electrospray." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/101052.
Full textDoctor of Philosophy
Vega, Fleitas Erica. "Study and Characterization of Hybrid Organic-Inorganic Perovskites for Solar Cells Applications." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/113402.
Full text[FR] Les perovskites orgàniques-inorgàniques de halurs de metilamoni i plom i les seues mescles han mostrat propietats optoelectròniques òptimes com a absorbent ideal per a aplicacions fotovoltaiques. Els dispositius solars basats en perovskita han evolucionat ràpidament, passant d'una eficiència del 3.9% en 2009, fins al 22.7% en 2017, i amb un cost de fabricació més baix que les cèl·lules solars de silici. No obstant això, un dels desavantatges de l'ús de absorbents de perovskita és la baixa estabilitat. En general, les cèl·lules que mostren un alt rendiment, perden la seua eficiència i es degraden ràpidament. Per a que aquestos materials puguen ser produits industrialment a gran escala és necessari estudiar-los en profunditat per millorar la eficiència i estabilitat. Una de les vies de millora és l'enginyeria composicional, estratègia que hem emprat en l'elaboració d'aquesta tesi i que consisteix en la investigació i la millora de les propietats optoelectròniques i morfològiques, derivades de la substitució i/o combinació de cations i anions, que constitueixen el material de perovskita. S'han sintetitzat pols purs de perovskita per a I, Br, Cl, a partir d'els quals es van preparar capes pures i mixtes MAPbX3-xYx per a millorar les propietats optoelectròniques i estructurals. Mitjançant anàlisi de difracció de raigs X, s'estudiaren les propietats estructurals del pols cristalins i capes pures i mixtes. Els anàlisis d'UV-vis i fotoluminiscència, mostren que el rang d'absorció varia al llarg de l'espectre visible en funció del contingut de l'halur. Les anàlisis de fotoluminiscència i calorimetria diferencial mostren els canvis de fase de les perovskites pures a diferents temperatures, coincidint aquestos canvis en totes dues anàlisis. L'anàlisi FESEM de les perovskites pures, mostra les diferències morfològiques entre els pols i capes. Seguint aquesta línia d'investigació, s'estudiaren les perovskites mixtes de iode-brom, amb un contingut de brom de fins el 33%, ajustant el bandgap per a evitar pèrdues en l'absorció i millorar les propietats optoelectròniques, estructurals i morfològiques. Malgrat les bones propietats optoelectròniques de les perovskites de metilamoni, el catió orgànic disminueix la estabilitat, la qual cosa ha portat a investigar l'ús d'altres cations inorgànics. Les perovskites de cesi són una alternativa prometedora, i per aquesta raó hem sintetitzat capes fines de perovskites de cesi mixtes, CsPbBr3-xIx, per tal de determinar els efectes de la substitució parcial del iode en les propietats físiques i l'estabilitat. Es van obtenir capes amb una bona resistència a la humitat i a la temperatura, afavorint la seua aplicació en el camp fotovoltaic. S'ha estudiat també la substitució parcial del catió de metilamoni amb altres cations orgànics, com el guanidini i imidiazoli. S'ha demostrat que petites quantitats de guanidini milloren l'estabilitat i la morfologia de les capes. S'ha establert que el límit de solubilitat del guanidini es del 20%, aproximadament, i s'ha determinat l'estructura cristal·lina de les mescles. S'ha observat un augment en la intensitat del pic de fotoluminiscència per a mescles per sota del límit de solubilitat. Es van obtenir resultats similars per a la substitució del metilamoni amb petites quantitats de imidazoli. Les anàlisis de difracció de raigs X van establir el límit de solubilitat en aproximadament el 10% i una millora en la cristalinitat. Els resultats de fotoluminiscència suggereixen que petites quantitats de imidazoli redueixen les recombinacions no radiatives, actuant com un pasivador efectiu. Finalment, es mostra el procés de fabricació de dispositius basats en MAPbI3 i sintetitzats en funció de les condicions ambientals, especialment la humitat relativa i utilitzant el dietil èter com anti-solvent. Els dispositius van mostrar una eficiència màx
[EN] Organic-inorganic methylammonium lead halides perovskites and their mixtures have shown optimal optoelectronic properties as an ideal absorber for photovoltaic applications. In the last decade, solar devices based on perovskite have evolved rapidly, going from an initial efficiency of only 3.9% in 2009, to an efficiency of 22.7% in 2017 and being, at the same time, more cost-effective than silicon solar cells. However, one of the main disadvantages when using perovskite absorbents in photovoltaic devices is their low stability. In general, cells that show high performance lose their efficiency and degrade rapidly. For these materials to be scalable it is necessary to carry out in-depth studies aiming at improved efficiency and stability. One of the main sources to improve stability and efficiency is compositional engineering, a strategy employed in the elaboration of this thesis, consisting of the investigation and improvement of the optoelectronic and morphological properties, derived from the substitution and / or combination of cations and anions, which constitute the perovskite material. Pure powders of perovskite were synthesized, for I, Br, Cl, from which pure and mixed MAPbX3-xYx films were prepared in order to improve their optoelectronic and structural properties. By means of X-ray diffraction analysis, the structural properties of crystalline powders and pure and mixed films were studied. Employing UV-vis and photoluminescence analysis, it was observed that the absorption range varied along the visible spectrum as a function of the halide content in the thin films. Both, photoluminescence and differential scanning calorimetry analysis showed the changes of phase of the pure perovskites at different temperatures. FESEM characterization of the pure perovskites showed the morphological differences between the powders and the films. Following this line of research, mixed perovskites of iodine-bromine with a bromine content of up to 33% were studied in more detail. The bandgap was tuned to avoid significant losses in absorption and improve the optoelectronic, structural and morphological properties. Despite the excellent optoelectronic properties of the methylammonium perovskite, the presence of the organic cation decreases its stability, which prompted research into the use of other inorganic cations. Cesium perovskites, are a very promising alternative, and for this reason we synthesized thin films of mixed cesium perovskites, CsPbBr3-xIx, to determine the effects of the partial substitution of iodine on physical properties and stability. Films with a very good resistance to moisture and temperature were obtained, which will favor the application of this type of perovskites in the photovoltaic field. The partial replacement of the methylammonium cation with other organic cations, such as guanidinium and imidiazolium, was also studied, showing that small amounts of guanidinium significantly improve the stability of the films and their morphology. It was established that the solubility limit of guanidinium is approximately 20%, and the crystalline structure of the mixtures was determined. An increase in the intensity of the photoluminescence peak for mixtures below the solubility limit was observed. Similar results were obtained for the substitution of methylammonium with small amounts of imidazolium. X-ray diffraction analyzes established the solubility limit at approximately 10% and an improvement in crystallinity. Photoluminescence results suggest that small amounts of imidazolium significantly reduce nonradiative recombinations, acting as an effective passivator. Finally, the manufacturing process of devices based on MAPbI3 and synthesized according to environmental conditions, especially relative humidity and using diethyl ether as anti-solvent is shown. The devices presented a maximum efficiency of 14.73%, proving that the oxidation of spiro-OMeTAD, under controlled humidity conditions, can improve efficiency.
Vega Fleitas, E. (2018). Study and Characterization of Hybrid Organic-Inorganic Perovskites for Solar Cells Applications [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/113402
TESIS
Zhang, Jie. "Roles of the n-type oxide layer in hybrid perovskite solar cells." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066634/document.
Full textSolar energy is one of the most important resources in our modern life. Photovoltaic is the most important technology to render the solar energy usable since photovoltaic solar cells harvest light coming from sun and convert sunlight into electrical energy. Dye sensitized solar cells have gained widespread attention due to their low cost, easy fabrication technique and tunable choice for the device. A traditional DSSC device includes a dye-sensitized photo-anode, a counter electrode and an electrolyte containing a redox couple system and additives. To improve the device stability, the liquid electrolyte replacement by a solid state hole transport material has been studied in so-called solid-state dye sensitized solar cells (ssDSSCs). Recently, an amazing light perovskite absorber was introduced into the ssDSSC system to replace the dye, opening the new field of research. Perovskite solar cells (PSCs) open a new era in photovoltaic due to the low cost of this material and the high efficiency of these cells. The power conversion efficiency has risen from 3.8% to a certified 20.1% within a few years. The components in the perovskite solar cell include: the compact metal oxide blocking layer, the electron transport layer, the lead halide perovskite layer, the hole transport layer and the back contact. In this thesis, we focused on the preparation and improving the properties of the electron transport layer and the perovskite layer
Hu, Yinghong [Verfasser], and Thomas [Akademischer Betreuer] Bein. "Moisture stability of hybrid perovskite solar cells / Yinghong Hu ; Betreuer: Thomas Bein." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/119109801X/34.
Full textGhanavi, Saman. "Organic-inorganic hybrid perovskites as light absorbing/hole conducting material in solar cells." Thesis, Uppsala universitet, Fysikalisk kemi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-205605.
Full textLiu, Mingzhen. "Planar heterojunction perovskite solar cells via vapour deposition and solution processing." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:89a275a8-5ec8-442c-a114-246a44dbd570.
Full textPawar, Krantikumar Subhash. "Ab Initio Modeling of an Electron Transport Layer Interface in Hybrid Perovskite Solar Cells." Wright State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1610125331928229.
Full textFU, QIANG FU. "POLYMER-TEMPLATED NUCLEATION AND CRYSTAL GROWTH OF PEROVSKITE FILM AND CONDUCTIVE IONOMER DOPED PEROVSKITE FILLM FOR HIGH PERFORMANCE OF ORGANIC-INORGANIC HYBRID PEROVSKITE SOLAR CELLS." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1495207539153854.
Full textDevesa, Canicoba Noelia. "Development and characterization of perovskite based devices : field effect transistors and solar cells." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S117.
Full textThe objective of this thesis was the study of electronic devices based on hybrid perovskites. In this context we have developed and produce field effect transistors (FETs) and solar cells based on hybrid perovskite material. In the case of transistors, using thin layers of highly crystallized hybrid perovskites we have made ambipolar transistors operating at room temperature and having low hysteresis, high transconductance (for this type of material) and a ratio of Ion / Ioff > 104. In the context of this thesis, the use of several dielectrics allowed us to obtain a high modulation of the channel conductance with relatively low gate voltages (4-6V). Hafnium oxide with relative permittivity er = 23.5 showed very good performances and a very good compatibility for the hybrid perovskite growth. After several polarization steps the devices exhibited stabilized operation and were measured in consecutive cycles for 14 hours with small change in their performance. We have shown that the increase of the electric field allowed the formation of a hole channel at the interface. The successive polarization of HfO2 / perovskite-based devices led to the creation of a second electron current and demonstrated a final ambipolar device. All the devices presented a hysteresis with amplitude sometimes not negligible. This demonstrated the presence of mobile ion charges at the interfaces that influence the output currents of the device. In the last part of the thesis we focused our work in hybrid perovskite growth for the production of solar cells. We have studied two growth conditions: conditions under normal air (relative humidity> 60%) and nitrogen atmosphere in glove boxes (relative humidity <0.1 ppm). By these two paths we obtained photovoltaic conversion efficiencies of 5% and 8% respectively
Rachalwar, Shantanu Rajendra. "Ab Initio Study of the Effects of Humidity on Perovskite Based Hybrid Solar Cell Interfaces." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1513964888018447.
Full textHUANG, ZIXU HUANG. "FLEXIBLE PEROVSKITE HYBRID SOLAR CELLS THROUGH ORGANIC SALT TREATED CONDUCTING POLYMER AS THE TRANSPARENT ELECTRODE." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525107429276123.
Full textHyung, Do Kim. "Development of Highly Efficient Organic-Inorganic Hybrid Solar Cells." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225630.
Full textRathod, Siddharth Narendrakumar. "Structure Stability and Optical Response of Lead Halide Hybrid Perovskite Photovoltaic Materials: A First-Principles Simulation Study." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1496189488934021.
Full textHou, Yi [Verfasser], and Christoph [Gutachter] Brabec. "Rational Interfaces Design of Efficient Organic–inorganic Hybrid Perovskite Solar Cells / Yi Hou ; Gutachter: Christoph Brabec." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2017. http://d-nb.info/1136133194/34.
Full textMeng, Tianyu. "High Performance Hybrid Perovskite Solar Cells Using Electron Beam Evaporated Processed TiOx as Electron Transfer Layer." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1431084608.
Full textWatthage, Suneth C. "Solution-Processed Fabrication of Hybrid Organic-Inorganic Perovskites & Back Interface Engineering of Cadmium Telluride Solar Cells." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1512390043951256.
Full textAmlani, Parin Divya. "Configuration and Electronic Properties of the Interface between Lead Iodide Hybrid Perovskite and Self-assembled Monolayers in Solar Cells." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1513855375235467.
Full textKiermasch, David [Verfasser], Vladimir [Gutachter] Dyakonov, and Christian [Gutachter] Schneider. "Charge Carrier Recombination Dynamics in Hybrid Metal Halide Perovskite Solar Cells / David Kiermasch ; Gutachter: Vladimir Dyakonov, Christian Schneider." Würzburg : Universität Würzburg, 2020. http://d-nb.info/1214594123/34.
Full textMöllmann, Alexander [Verfasser]. "Nanostructured Metal Oxide Thin Films as Electron Transport Material for Inorganic-Organic Hybrid Perovskite Solar Cells / Alexander Möllmann." München : Verlag Dr. Hut, 2020. http://d-nb.info/1219478067/34.
Full textYu, Yue. "Thin Film Solar Cells with Earth Abundant Elements: from Copper Zinc Tin Sulfide to Organic-Inorganic Hybrid Halide Perovskite." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1513289830601094.
Full textHadouchi, Warda. "Etude de l'utilisation du ZnO comme contact de type n dans des dispositifs photovoltaïques à base de pérovskite hybride." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX012/document.
Full textPerovskite solar cells have marked the photovoltaic world with a spectacular increase of efficiencies over the last four years. With efficiencies exceeding 20%, this type of solar cells attracts a particular attention in the photovoltaic field. In the standard perovskite solar cell stack, TiO2 is used as an electron-collecting layer. This oxide layer plays an important role in the cell, however, its growth process requires a high temperature annealing step. In addition to the high production costs involved, its use also exclude its application to temperatures sensitive substrates such as flexible plastic materials.This thesis focuses on the replacement of the TiO2 bilayer by a ZnO electron-collecting and hole-blocking layer. We consider ZnO as an alternative to its comparable and even superior properties. One of the interests of the choice of ZnO lies in its simplicity of implementation and the possibility to synthesize it at low temperature (<100°C) and under different structures. The ZnO is here synthesized by electrochemical way and sputtering process. Under optimized deposition conditions of perovskite and ZnO layers, record efficiencies of 14.2% and 9.7% have been obtained in planar and nanostructured architecture respectively
Sahin, Tiras Kevser. "Magnetic field effect and other spectroscopies of organic semiconductor and hybrid organic-inorganic perovskite devices." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6495.
Full textFournier, Olivier Jaques Henri. "Effects of the interfaces in planar hybrid lead trihalide perovskite solar cells with n-type and p-type inorganic charge transport layers." Thesis, KTH, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246122.
Full textPerovskite solar cells are an emerging and promising thin film technology, which reached high efficiencies in an unprecedented short time. However, the current architecture of the cell, which includes titanium oxide and Spiro-OMeTAD (an organic compound) as charge transport layers (CTLs), lacks stability and shows hysteretic behavior. In order to assess these major issues, inorganic CTLs are developed in the PV community. This work performs a thorough review of the literature regarding these inorganic CTLs. Four of them are identified as good candidates because of the high performances they reached, and of their chemical stability: SnO2, ZnO, CuSCN and NiO. The significance of the interfaces in this kind of cell is also demonstrated. Numerical simulation of CTLs is also performed using a dedicated 1D modelisation tool (SCAPS), which allows us to propose key parameters to optimize in a CTL. Finally, the effects of the interface on the performances of a perovskite solar cell are studied with hyperspectral imaging of photoluminescence response of the cell. Using a proper fit algorithm, this non-destructive method gives insight into the opto-electronic properties of the perovskite grown on different substrates.
Ralaiarisoa, Maryline. "Electronic properties of hybrid organic-inorganic perovskite films: effects of composition and environment." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20194.
Full textThe present thesis aims at characterizing the electronic properties of solution-processed hybrid organic-inorganic perovskites (HOIPs) in general, and the HOIP methyl ammonium (MA) lead iodide-chloride (MAPbI3-xClx) films, in particular, at different stages, namely from its formation to its degradation, by means of photoelectron spectroscopy (PES). Firstly, the formation of MAPbI3-xClx films upon thermal annealing is monitored by a combination of PES, time-of-flight secondary ion mass spectrometry, and grazing incidence X-ray diffraction for disclosing changes in electronic properties, film composition, and crystal structure, respectively. Overall, the results point to the essential mediating role of chlorine in the formation of a highly textured perovskite film. The film formation is accompanied by a change of composition which leads to the film becoming more n-type. The accumulation of chlorine at the interface between perovskite and the underlying substrate is also unambiguously revealed. Secondly, the separate effects of water and oxygen on the electronic properties of MAPbI3-xClx film surfaces are investigated by PES. Already low water exposure – as encountered in high vacuum or inert conditions – appears to reversibly impact the work function of the film surfaces. Water vapor in the mbar range induces a shift of the valence band maximum (VBM) away from the Fermi level accompanied by a decrease of the work function. In contrast, oxygen leads to a VBM shift towards the Fermi level and a concomitant increase of the work function. The effect of oxygen is found to predominate in ambient air with an associated shift of the energy levels by up to 0.6 eV. Overall, the findings contribute to an improved understanding of the structure-property relationships of HOIPs and emphasize the impact of least variation in the environmental conditions on the reproducibility of the electronic properties of perovskite materials.
Li, Yifan Li. "High Performance Perovskite Hybrid Solar Cell Via Interfacial Engineering." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462812515.
Full textWeber, Oliver. "Structural chemistry of hybrid halide perovskites for thin film photovoltaics." Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761012.
Full textEperon, Giles E. "Active layer control for high efficiency perovskite solar cells." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:1fa78aab-7479-4fe2-8192-e1be1d12c171.
Full textLee, Michael M. "Organic-inorganic hybrid photovoltaics based on organometal halide perovskites." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:9384fc54-30de-4f0d-86fc-71c22d350102.
Full textAlsari, Almheiri Mejd. "Correlating structural and opto-electrical properties of perovskite solar cells." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288606.
Full textGuo, Xin. "PREPARATION AND PROPERTY STUDIES OF ORGANIC-INORGANIC HYBRID SEMICONDUCTOR MATERIALS FOR SOLAR CELL APPLICATIONS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1458736601.
Full textAlmora, Rodríguez Osbel. "Hysteresis and Capacitive Features of Perovskite Solar Cells." Doctoral thesis, Universitat Jaume I, 2020. http://hdl.handle.net/10803/669272.
Full textEn el presente trabajo se estudian por varios métodos las distorsiones anómalas en la característica de corriente-voltaje de las celdas solares de perovskita (PSC), típicamente llamada histéresis de J-V. Esto incluye experimentos dinámicos de J-V en modo de corriente continua (DC) y análisis de espectroscopía de impedancia (IS) en oscuridad y bajo iluminación. Las curvas J-V en oscuridad de las PSCs exhiben corrientes capacitivas, relacionadas con un exceso de capacitancia de baja frecuencia en los espectros de IS. Estas dos características están correlacionadas con la respuesta de iones móviles en regiones espaciales de carga hacia las interfaces. Los grandes valores de capacitancia bajo iluminación a frecuencias por debajo de las unidades de Hz se explicaron en términos de regiones de cargas espaciales de iones móviles y capacitancias químicas, suponiendo una proporcionalidad entre el número de iones móviles ionizados/activados y la concentración de portadores de carga y flujo de fotones.
Lini, Matilde. "Optoelectronic characterization of hybrid organic-inorganic halide perovskites for solar cell and X-ray detector applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23213/.
Full textLe, Huong. "Elaboration de nouveaux matériaux de transport de trous pour cellules photovoltaïques hybrides à perovskite." Thesis, Cergy-Pontoise, 2018. http://www.theses.fr/2018CERG0979/document.
Full textThe aim of the thesis is to develop and study the potential of organic hole transporting materials (HTMs) for photovoltaic applications using perovskite-based solar cells (PSCs). Several families of HTM molecules have been prepared and deposited in solution for the fabrication of solar cells. Since the main objective is to study and provide information on the relationship between the molecular structure of new hole transport materials and the photovoltaic performances obtained, this study contributes to a better fundamental understanding of the required properties of hole transport materials for better photovoltaic performance.The first study concerns the development of p-type molecules based on Thieno [3,2-b] thiophene as a central unit and π-linker with dimethoxytriphenylamine as end-capping electron donors. Different configurations are designed and revealed significantly different photovoltaic performances in the PSC devices. Remarkable, a planar structure with linear conjugation shows higher values of mobility and conductivity than others, thus it improved device performances.In the second study, donor-acceptor molecules based on 9(10H)Acridone derivatives as an acceptor were developed. By incorporating different electron-donating fragments, we obtain structures with favorable characteristics for both good intramolecular charge transfer (ICT) character and adequate HOMO-LUMO energy levels. Their energy levels are suitable for collecting and injecting the holes from perovskite to the metal electrode through the HTM. Similar studies have been done with Thioxanthone.Using a cheap precursor and facile preparation, the third study synthesized a 9.9'-biacridone derivative. These p-type molecules possess a three-dimensional structure which is similar to that of Spiro-OMeTAD, state-of-the-art molecule for PSCs.Finally, the last study focus on the development of donor-acceptor molecules based on thieno [3,4-c] pyrrole-4,6-dione (TPD). The objective is elaboration of the planar structure molecule which could be improved the π-π stacking effect in the device fabrication without grain boundaries. These molecules also own a strong ICT character, an extended π-conjugation on the whole structure and a good solubility which makes it an ideal candidate for the dopant-free HTM in PSCs
Hosseinian, Ahangharnejhad Ramez. "Fabrication of Perovskite Solar Cells & Applications in Multijunction Configurations." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1575980394222122.
Full textNandayapa, Bermudez Edgar Ricardo. "Metal Halide Perovskites: Photophysics and Inkjet Printing of Solar Cells." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/23121.
Full textMetal halide perovskites (MHPs) are semiconductor materials that show unique photophysical properties, making them ideal for photovoltaic applications. Having shown power conversion efficiencies of up to 25.5%, techniques are continuously being developed to push perovskites to unprecedent limits. Yet, these materials present challenges like a low stability under a variety of conditions as well as a large disparity between the efficiencies of lab scale and large area devices. This thesis addresses these two major obstacles. First, charge transfer mechanisms between MHPs and atmospheric gases were studied to determine their effect on the material stability by using photoluminescence spectroscopy. By comparing the emission of MHPs, the effect that molecular oxygen, nitrogen, argon, and water have on boundary defects in the material was studied. These quenching effects were later analyzed using the Stern-Volmer model. It was found that the gases bounce off the surface, but a portion of them bind to the MHPs, in occasions passivating defects on the crystals. Using these results, charge transfer mechanisms were proposed for each one of the gases. Second, scaling of MHP devices was examined using inkjet printing. For this, three crystallization techniques were evaluated. One of them used sequential deposition of two precursor inks, while the other two crystallized ink that was deposited in one step. Both latter techniques used low pressures, below 1 mbar, and only one of them applied a controlled stream of nitrogen to the sample. Using these techniques, the deposition of a 15x15 cm² area as well as a device with an efficiency of 16.8% on an area of 0.16 cm² were demonstrated. These results show a novel procedure to study non-radiative loss paths in MHPs to enhance their stability and performance as devices. Also, they show that inkjet printing is a favorable technology to scale MHP devices and eventually facilitate the mass production of this type of photovoltaic devices.
Hambsch, Mike, Qianqian Lin, Ardalan Armin, Paul L. Burn, and Paul Meredith. "Efficient, monolithic large area organohalide perovskite solar cells." Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A36282.
Full textGheno, Alexandre. "Printable and printed perovskites photovoltaic solar cells for autonomous sensors network." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0108/document.
Full textThis thesis is about the design of photovoltaic solar cells based on hybrid perovskite using inkjet printing technology. The first two chapters present the context of the thesis, namely the powering of an autonomous sensor network, and review the scientific aspects of inkjet and photovoltaic technologies. The third chapter presents the development of a state-of-the-art photovoltaic cell and its evolution towards a printable architecture at low annealing temperatures. The problem of the stability of photovoltaic cells with perovskite is also discussed. The last part presents the different aspects and problems of the inkjet printing of the three inner layers of a perovskite solar cell. At the end of this work the possibility of printing perovskite solar cells with efficiencies higher than 10% has been demonstrated, all in ambient conditions and at low temperature
Marronnier, Arthur. "Anharmonicity and Instabilities in Halide Perovskites for Last Generation Solar Cells." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX031/document.
Full textHybrid halide perovskites (ABX3) have emerged over the past five years as absorber layers for novel high-efficiency low-cost solar cells combining the advantages of organic (molecule A) and inorganic (metal B, halogen X) materials. Very recently, fully inorganic perovskite quantum dots also shown promising efficiencies, making them a potentially stable and efficient alternative to their hybrid cousins.The aim of this PhD thesis is to study and better understand both the structural and thermodynamic instabilities of these halide perovskites, with a specific focus on purely inorganic CsPbI3 structures.We first use various ab-initio techniques, the majority of which are based on Density Functional Theory (DFT) and its linear-response approach (DFPT), to investigate the vibrational and electronic properties of the different phases of CsPbI3. While the black γ-phase, crucial for photovoltaic applications, is shown to behave harmonically around equilibrium, for the other three phases frozen phonon calculations reveal a Brillouin zone center double-well instability. We also show that avoiding the order-disorder entropy term arising from these double-well instabilities is key in order to prevent the formation of the yellow perovskitoid phase, and evidence a Rashba effect when using the symmetry breaking structures obtained through frozen phonon calculations. We then analyze the structural changes and the dynamical Rashba splitting along molecular dynamics trajectories in the light of our findings.In a second phase, we investigate the thermodynamical stability of hybrid perovskite MAPbI3. Our experimental ellipsometry-based study brings better understanding of the chemical decomposition of MAPbI3 into its two precursors, methylammonium and lead iodides, which we predicted using DFT stability diagram calculations and which we confirm by X-Ray diffraction. Last, we prove that hybrid perovskite structure MAPbI3 behaves more like inorganic compounds (high dielectric constant, low exciton binding energy) than like organic materials (low dielectric constant, high exciton binding energy)
Yao, Disheng. "Interfacial and compositional engineering of perovskite solar cells for enhanced device performance and stability." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/202693/1/Disheng_Yao_Thesis.pdf.
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