Дисертації з теми "Dye-sensitized solar cells (DSCs)"
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Almodôvar, Vítor Alexandre da Silva. "Diketopyrrolopyrroles for dye-sensitized solar cells." Master's thesis, Universidade de Évora, 2017. http://hdl.handle.net/10174/22074.
Повний текст джерелаLi, Sin-lai Emily, and 李倩麗. "Theoretical study of dye-sensitized solar cell (DSSC)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B41897195.
Повний текст джерелаLi, Sin-lai Emily. "Theoretical study of dye-sensitized solar cell (DSSC)." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B41897195.
Повний текст джерелаDELL'ORTO, ELISA CAMILLA. "Dye sensitized solar cells: materials and processes." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2012. http://hdl.handle.net/10281/28476.
Повний текст джерелаMARCHINI, EDOARDO. "New Components for Dye Sensitized Solar Cells." Doctoral thesis, Università degli studi di Ferrara, 2022. http://hdl.handle.net/11392/2496481.
Повний текст джерелаA causa dell’aumento della richiesta energetica e della necessità di esplorare risorse sostenibili, ingenti sforzi sono rivolti verso l’applicazione di tecnologia solare. Grazie alle loro peculiarità, le Celle Solari Sensibilizzate con Colorante (DSSCs) potrebbero essere uno strumento complementare alla tecnologia al silicio. Questa tesi di Dottorato è incentrata nella comprensione delle proprietà (foto)/elettrochimiche di nuovi componenti per DSSCs. Il primo capitolo sperimentale, realizzato in collaborazione con il gruppo del Prof. Stagni, ha avuto come scopo la caratterizzazione di nuovi sensibilizzatori di Ru(II)-tetrazolati come esempio di complessi privi di leganti tiocianati. Quattro complessi (D1-D4) sono stati studiati assieme al ben noto standard di rutenio N719. La combinazione dell’analisi elettrochimica e spettroscopica ha evidenziato come la termodinamica dello stato fondamentale ed eccitato sia in grado di favorire un’efficiente separazione di carica. Queste caratteristiche hanno portato ad una resa quantica di conversione di fotoni in elettroni superiore all’80%. D4 è risultato essere il complesso più efficiente grazie alla combinazione della più estesa estensione spettrale, efficiente rigenerazione ed efficiente iniezione di carica. Gran parte della mia attività, tuttavia, è stata rivolta allo studio di sensibilizzatori per DSSCs a base di ferro. Tre capitoli, in collaborazione con i gruppi del Dr. P. C. Gros e dalla Dr. M. C. Pastore, riportano l’investigazione delle proprietà elettroniche di sensibilizzatori di Fe(II)NHC. Nel primo di questi abbiamo studiato le proprietà di trasferimento dinamiche di un complesso omolettico denominato C1, caratterizzato da leganti NHC σ-donatori e gruppi carbossilici π-accettori, il quale aveva inizialmente restituito valori di efficienza dello 0.13%. Abbiamo ottenuto un sostanziale aumento di efficienza ottenendo valori vicini all’1%. Il rendimento quantico di iniezione di carica è risultato essere attorno al 50% e costituisce il principale fattore limitante per le DSSCs a base di ferro. L’energetica dello stato eccitato è risultata ottimale per un’efficiente iniezione di carica quindi, le limitate prestazioni esibite da C1 derivano dal suo design simmetrico che porta ad un accoppiamento elettronico non favorevole con la superficie. Abbiamo così analizzato complessi carbenici eterolettici, il primo di questi era l’analogo asimmetrico di C1, ARM13, altri due invece erano caratterizzati dall’introduzione di un anello tiofenico (ARM7) e uno fenilico (ARM11) aventi la funzione di spaziatori fra le funzionalità ancoranti e le piridine coordinate al metallo centrale. L’idea di questo nuovo design era quella di aumentare la separazione di carica ed incrementare la capacità di raccolta di fotoni. Abbiamo ottenuto la più alta efficienza di cella riportata in letteratura del 1.5% per ARM13. In un terzo progetto abbiamo analizzato una nuova famiglia di complessi eterolettici caratterizzati dall’introduzione di gruppi elettron-donatori o elettron-attrattori sui leganti ancillari. ARM130, caratterizzato da una funzionalità dimetossifenilica, ha restituito le migliori performances dell’1.83%. L’ultimo capitolo della mia tesi riguarda invece lo studio di un controelettrodo (CE) alternativo per DSSCs basato su polimeri conduttori a base di poli(3,4-etilendiossitiofene) (PEDOT), fra questi il ben noto PEDOT/ClO4 (PER), elettropolimerizzato da solventi organici, risulta essere il miglior materiale elettrocatalitico. Al fine di studiare soluzioni più sostenibile, abbiamo esplorato le proprietà elettrochimiche di CE a base di PEDOT/Nafion (NAF) prodotti in ambiente acquoso. Il comportamento elettrocatalitico di PER e NAF è stato investigato in celle simmetriche mediante LSV ed EIS e in celle solari in presenza di D35, quest’ultimo ha generato efficienze di cella comparabili a quelle registrate in presenza di PER.
Falsgraf, Erika S. "Biologically-Derived Dye-Sensitized Solar Cells: A Cleaner Alternative for Solar Energy." Scholarship @ Claremont, 2012. http://scholarship.claremont.edu/pomona_theses/61.
Повний текст джерелаGarcia, Mayo Susana. "Dye-Sensitized Solar Cells: the future of consumer electronics?" Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36993.
Повний текст джерелаHasin, Panitat. "Developing New Types of Electrode Materials for Dye-Sensitized Solar Cells (DSSCs)." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1258071882.
Повний текст джерелаLONGHI, ELENA. "MOLECULAR DESIGN AND SYNTHESIS OF DYES FOR DYE-SENSITIZED SOLAR CELLS (DSSCS)." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/168368.
Повний текст джерелаHua, Yong. "Design and synthesis of new organic dyes for highly efficient dye-sensitized solar cells (DSSCs)." HKBU Institutional Repository, 2014. https://repository.hkbu.edu.hk/etd_oa/71.
Повний текст джерелаPan, Jie. "MATERIAL PROPERTY STUDY ON DYE SENSITIZED SOLAR CELLS AND CU(GA,IN)SE2 SOLAR CELLS." Miami University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1240594917.
Повний текст джерелаPan, Jie. "Material property study on dye sensitized solar cells and cu(ga,in)se2 solar cells." Oxford, Ohio : Miami University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1240594917.
Повний текст джерелаDeshpande, Rohitkumar Ashok. "A New Approach to the Benzoporphyrins: Towards Dye Sensitized Solar Cells." Oxford, Ohio : Miami University, 2010. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1272301970.
Повний текст джерелаLEONARDI, ENRICO. "Sealing materials: encapsulation procedures and ageing tests for dye sensitized solar cells." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1307.
Повний текст джерелаDuring last few years Dye sensitized solar cells (DSCs) were intensively studied leading the researchers to achieve high photo to current conversion efficiencies. These values make closer the start of industrial production, but first there are still open points that mast be resolved before. Long term stability, sealing materials and procedures are among the most important. In the fist part of this work it was studied how to improve the cohesion characteristics of the most commonly used sealer in DSC application (Bynel) using material pre-treatments and new sealing procedures. It was also carried out a search campaign to find alternative encapsulating materials and it was demonstrated that UV curing technologies can be used in DSC sealing procedures without damaging the cell compounds. The last part of the thesis concerns the long term stability combining the time-dependence of electrical parameters of the devices to the electro-impedance analysis in order to provide a physical explanation of the degradation mechanism. Furthermore test point out the presence of a transient to be taken into account before evaluating cell performance.
Bendoni, Riccardo. "Processi di deposizione di blocking layers di TiO2 per Dye - Sensitized Solar Cells (DSSC)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3041/.
Повний текст джерелаZhang, Lei. "Exploring Electron Transfer Dynamics of Novel Dye Sensitized Photocathodes : Towards Solar Cells and Solar Fuels." Doctoral thesis, Uppsala universitet, Fysikalisk kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302263.
Повний текст джерелаHernández, Redondo Ana. "Copper(I) polypyridine complexes : the sensitizers of the future for dye-sensitized solar cells (DSSCs) /." [S.l.] : [s.n.], 2009. http://edoc.unibas.ch/diss/DissB_8757.
Повний текст джерелаGong, Yun. "Structure-property relationships of dyes as applied to dye-sensitized solar cells." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275007.
Повний текст джерелаDelices, Annette. "Organized Organic Dye / Hole Transporting Materials for TiO2- and ZnO- based Solid-State Dye-Sensitized Solar Cells (s-DSSCs)." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC066/document.
Повний текст джерелаDue to instability problems of dye sensitized solar cells (DSSCs) in longtime uses, the iodine based liquidelectrolyte has been replaced by several types of solid hole transporting materials (HTM) to perform solidstate DSSCs (s-DSSCs). Among them, the substitution by conducting polymers (CP) has attractedconsiderable attention because of their good stability, high hole-conductivity and simple deposition withinthe mesoporous TiO2 semiconductor. In this thesis work, several s-DSSCs based on CPs used as HTM havebeen developed in order to improve their photovoltaic performances taking into account the following twoobjectives: (i) the optimization of the interfacial charge transfer processes within the solar cell, and (ii) theoptimization of the charge transport within the n-type oxide semiconductor. To reach these goals, eachcomponent that constitutes the device was varied in order to investigate its effect on the device’sperformances. As first attempt, an analytical study is carried out by varying the sensitizer in order todetermine the fragments of the dyes structures, that have an important effect on the in-situ photoelectrochemical polymerization process (PEP) both in organic and in aqueous media and hence on theperformances of the s-DSSCs. Based on these results, a new concept of removing completely the interfacebetween the dye and the HTM is developed. This is achieved by the synthesis of new dyes covalently linkedto an electroactive monomer which is co-polymerized by in-situ PEP. The resulting co-polymer, used asHTM, is covalently linked to the dye. In addition, the nature of the chemical bond linking the triphenylamineresidue TPA to the monomer is also investigated as a key factor in the s-DSSCs performances. Besides, andto optimize the charge transport processes within this type of s-DSSC, the elaboration of novel ZnO baseds-DSSCs has been achieved and investigated
Oscarsson, Johan. "Towards Mixed Molecular Layers for Dye-Sensitized Solar Cells : A Photoelectron Spectroscopy Study." Doctoral thesis, Uppsala universitet, Molekyl- och kondenserade materiens fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-301164.
Повний текст джерелаWang, Bo. "SOLID STATE AND LIQUID STATE NANOCRYSTALLINE SOLAR CELLS ON RIGID AND FLEXIBLE SUBSTRATES." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1281658251.
Повний текст джерелаVladimir, Shuster. "Phenazine: A Building Block for Multinuclear and Heterometallic Complexes, Where the Ligand Acts as an Electron Acceptor and Radical Abstractor." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24234.
Повний текст джерелаMagni, M. "COPPER AND RUTHENIUM COMPLEXES IN SENSITIZED SOLAR CELLS AND OPTOELECTRONICS." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/333099.
Повний текст джерелаCamaratta, Rubens. "Synthesis Of ZnO and TiO2 By Biomimetization Of Eggshell Membranes And Its Evaluation As Anode In Dye-Sensitized Solar Cells." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/113416.
Повний текст джерелаEsta tesi presenta un conjunt original de procediments per a la síntesi de nanoestructuras de TiO2 i ZnO per biomimetización de membranes de corfa d'ou obtenint materials valuosos per a fotovoltaica com es mostra en la seua avaluació de rendiment com a ànode en cèl·lules solars sensibilitzades per colorant. "El manuscrit està dividit en 7 capítols. En el primer capítol, titulat Introducció, es presenten les bases teòriques per a la comprensió dels processos de biomimetización, membranes de corfa d'ou, síntesi de ZnO i TiO2, i cèl·lules solars sensibilitzades per colorants (DSSC) . Després del capítol introductori, el Capítol 2 revela els objectius generals i específics d'esta investigació. Posteriorment, el Capítol 3 descriu el procediment experimental utilitzat per a les síntesis i caracteritzacions de ZnO i TiO2, així com el procediment utilitzat en l'acoblament i la caracterització de les cèl·lules fotovoltaiques. En el capítol 4 es presenten i discutixen els resultats obtinguts amb les síntesis i l'aplicació de les pols com fotodoles en DSSC. En este capítol, hem decidit subdividir-ho en seccions específiques per a explicar qüestions científiques específiques sobre el tema. En el capítol 5 es presenten les conclusions de l'estudi en vista dels diferents aspectes: obtenció de TiO2 biomimético i ZnO, diferències entre les pols sintetitzats per biomimetización de les membranes de corfa d'ou, i la caracterització de les cèl·lules construïdes amb les pols biomiméticos.
This thesis introduces an original set of procedures for the Synthesis of ZnO and TiO2 nanostructures by biomimetization of eggshell membranes obtaining valuable materiales for photovoltaic as shown on their performance evaluation as anode in Dye-Sensitized Solar Cells". The manuscript is divided into 7 chapters. In the first chapter, entitled Introduction, it is presented the theoretical bases for the understanding of the biomimetization processes, eggshell membranes, ZnO and TiO2 syntheses, and dye-sensitized solar cells (DSSC). After the introductory chapter, Chapter 2 reveals the general and specific objectives of this research. Subsequently, Chapter 3 describes the experimental procedure used for the syntheses and characterizations of ZnO and TiO2 as well as the procedure used in the assembly and characterization of the photovoltaic cells. In chapter 4 are presented and discussed the results obtained with the syntheses and application of the powders as photoanodes in DSSC. In this chapter, we have chosen to subdivide it into specific sections to explain specific scientific issues on the subject. In chapter 5 the conclusions of the study are presented in view of the different aspects: obtaining ZnO and biomimetic TiO2, differences between the powders synthesized by biomimetization of eggshell membranes, and the characterization of the cells constructed with the biomimetic powders.
Camaratta, R. (2018). Synthesis Of ZnO and TiO2 By Biomimetization Of Eggshell Membranes And Its Evaluation As Anode In Dye-Sensitized Solar Cells [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/113416
TESIS
Haynes, Keith M. "Molecules and Materials for Excitonic Solar Cells Using P-type Metal Oxide Semiconductors." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc804970/.
Повний текст джерелаHenek, Tomáš. "Charakterizace vlastností perovskitovských fotovoltaických článků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376942.
Повний текст джерелаJradi, Fadi M. "Organic light-harvesting materials for power generation." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54976.
Повний текст джерелаRisbridger, Thomas Arthur George. "Aqueous dye sensitized solar cells." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607628.
Повний текст джерелаPalma, Giuseppina. "Nanostructured dye-sensitized solar cells." Doctoral thesis, Università degli studi di Trieste, 2014. http://hdl.handle.net/10077/9972.
Повний текст джерелаDye-sensitized solar cells (DSSCs) represent a promising alternative to silicon-based technology. From the first publications about DSSCs in the 90s, they are considered an important breakthrough for achieving high efficiency by using relatively inexpensive and abundant materials. Stability and efficiency are two crucial points in the development of this new class of hybrid photovoltaic devices. Most of the DSSC studies carried out over the past twenty years are based on the optimization of these two aspects. In particular, no particular efficiency improvement was obtained in the last period, although many efforts have been made for the research of appropriate solutions able to allow to fabricate more efficient devices. In this scenario, the topic of interest for this thesis is to further enhance the photovoltaic performance of DSSCs by integrating a nano-engineered TiOx photoanode obtained by means of a new nanostructuring method. This novel method, called ASB-SANS (Auxiliary Solvent-Based Sublimation-Aided NanoStructuring) allows the fast nanostructuring of a material in conditions of room temperature and atmospheric pressure. The nanostructuring process occurs by means of an auxiliary sublimating substance that, after having influenced the spatial arrangement of the material to be nanostructured, sublimates away from the system spontaneously. So-obtained TiOx photoanodes are characterized by an inner surface area which is higher than that of commonly used photoanodes. This implies that higher dye loading values are possible, in turn meaning an increase of photogenerated charge carriers upon sunlight absorption, hence an overall increase of the DSSC efficiency. This thesis is structured as following: - Chapter 1 is a general introduction to the photovoltaics and dye-sensitized solar cells, such as the operating principles and the characteristics of the dye cell; - Chapter 2 presents the motivation and objectives of PhD work, with particular interest in the state of art on the semiconductor layer optimization; - Chapter 3 contains a description of the two instrumental systems assembled by the author and colleagues for the characterization of photovoltaic devices (current/voltage recording system and IPCE system). A particular focus is put on the development of a tool for the determination of the photovoltaic quantum efficiency obtained by the conversion of a common UV-Vis spectrometer; - Chapter 4 is focused on the description of two methods for the determination of the active sites (dye grafting points) of the TiOx surface: the first based on the acetic acid adsorption and the second on the dye molecules adsorption. These methods are used for the characterization of all fabricated photoanodes; - Chapter 5 starts with the proven effectiveness of the ASB-SANS method applied to nanostructuring, over relatively large areas, a semiconducting polymer widely used in organic solar cells. The chapter is then focused on the description of the ASB-SANS method applied to fabricate our nano-engineered photoanodes; - Chapter 6 presents the results obtained by the application of the nano-engineered photoanodes in photovoltaic devices; - Chapter 7 reports some final conclusions together with our outlooks in the future research and development of the nano-engineered photoanodes for dye-sensitized solar cells.
Le celle solari a colorante organico (DSSC) proposte da Grätzel rappresentano una promettente alternativa alle tecnologie basate sul silicio già in commercio. Dalle prime pubblicazioni negli anni 90 esse hanno reppresentato un importante passo avanti per raggiungere un’efficienza relativamente alta utilizzando materiali poco costosi e abbondanti in natura. Gli aspetti più importanti per lo sviluppo di questa tecnologia sono la stabilità e l’efficienza, su cui si fonda la maggior parte degli studi sulle DSSC condotti negli ultimi vent’anni. In particolare, nonostante gli sforzi enormi nella ricerca di soluzioni appropriate che consentissero di fabbricare dispositivi più efficienti, nessun particolare incremento di efficienze è stato registrato. In questo scenario, il presente lavoro di tesi ha come scopo il miglioramento della performance fotovoltaica di DSSC attraverso l’integrazione al loro interno di un fotoanodo di TiOx nanostrutturato utilizzando un nuovo metodo di fabbricazione. Questo metodo, denominato ASB-SANS (Auxiliary Solvent- Based Sublimation-Aided NanoStructuring) permette la nanostrutturazione di un materiale senza dispendio di tempo ed in condizioni di temperatura ambiente e pressione atmosferica. La nanostrutturazione di un materiale avviene per mezzo di un sublimante ausiliario che, dopo aver influenzato la disposizione spaziale del materiale, si allontana dal sistema spontaneamente per semplice sublimazione. I fotoanodi di TiOx così ottenuti presentano una superficie esposta all’attacco del colorante maggiore di quella esposta generalmente dai fotoanodi comunemente impiegati. Ciò comporta un aumento della quantità di colorante che il fotoanodo può adsorbire che si traduce in un aumento della quantità di portatori di carica che si possono generare per effetto dell’assorbimento della luce solare. Il miglioramento della corrente generata nel dispositivo influenzerà positivamente l’efficienza globale della cella DSSC. Il presente lavoro di tesi è strutturato nel seguente modo: - il Capitolo 1 costituisce l’introduzione alla tematica di interesse con un approfondimento descrittivo dei componenti di una DSSC e del suo funzionamento; - il Capitolo 2 espone la motivazione e gli obbiettivi del lavoro di dottorato con particolare interesse verso lo stato dell’arte inerente alla motivazione espressa; - il Capitolo 3 contiene la descrizione accurata dei sistemi di caratterizzazione di dispositivi fotovoltaici. Di particolare rilievo è la messa a punto di uno strumento per la determinazione dell’efficienza quantica. Quest’ultimo è stato ottenuto assemblando un comune spettrometro UV-Vis con un multimetro per la registrazione delle correnti generate dalla cella; - il Capitolo 4 improntato sulla descrizione di due metodi per la determinazione dei siti attivi (punti di attacco del colorante) presenti sulla superficie del TiOx: il primo basato sull’adsorbimento dell’acido acetico e il secondo sull’adsorbimento delle molecole di colorante. Tali metodi serviranno per la caratterizzazione dei fotoanodi nanostrutturati; - il Capitolo 5 si apre con la provata efficacia del metodo di nanostrutturazione ASB-SANS applicato su polimeri di interesse fotovoltaico. Il fulcro del capitolo è tutto rivolto alla descrizione del metodo applicato al sistema di nanoparticelle di TiOx, con tute le soluzioni tecniche adottate per renderlo altrettanto efficace su questo genere di sistemi; - il Capitolo 6 riporta i risultati ottenuti per l’applicazione dei fotoanodi del capitolo 5 all’interno dei dispositivi fotovoltaici; - il capitolo 7 conclude il lavoro e riporta le eventuali prospettive per il futuro.
XXVI Ciclo
1984
Greijer, Agrell Helena. "Interactions in Dye-sensitized Solar Cells." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3752.
Повний текст джерелаCameron, Petra Jane. "Studies of dye sensitized solar cells." Thesis, University of Bath, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407482.
Повний текст джерелаMaluta, Eric N. "Simulations of dye-sensitized solar cells." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538165.
Повний текст джерелаZahiko, I. V. "TiO2-based dye-sensitized solar cells." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/34953.
Повний текст джерелаYu, Cheng-Lun. "Titanium dioxide thick film printing paste for dye sensitized solar cell." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1291216520.
Повний текст джерелаNoureen, Sajida. "Nouveaux ligands polypyridiniques à motifs dithiénylpyrroles et complexes de ruthénium correspondants. Propriétés électroniques et applications en photosensibilisation dans les cellules solaires à colorants (DSSC)." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0029/document.
Повний текст джерелаDye-sensitized Solar Cells (DSSC) appear to be promising devices. Operation principle relies on the photosensitization of a wide-gap semiconductor with a dye, the latter typically being a polypyridinyl ruthenium(II) complex. Modulation of the properties of such complexes enables the optimization of the corresponding solar cells' performances. In the present work, we synthesized and investigated the effect of new bipyridine ligands bearing electron-donating dithienylpyrroles (DTP). These moieties induced red-shifts of the absorption spectra in homoleptic, bis- and tris-heteroleptic Ru(II) complexes especially when the DTP was bound by its thiophene unit to the bipyridine ligand. A notable increase of the molar extinction coefficients was also obtained. All new compounds have been characterized by using spectroscopic, electrochemical, photophysical and computational chemistry techniques. Two heteroleptic complexes have been tested in DSSCs. Despite excellent light harvesting properties, performances were found lower than those of standard dyes as revealed by J/V and IPCE curves. Stereoelectronic effects could be involved since the bulky DTP moiety could impede an efficient access of the mediator to Ru(III) centers
Pellejà, i. Puxeu Laia. "Exploring novel dye concepts in dye sensitized solar cells." Doctoral thesis, Universitat Rovira i Virgili, 2014. http://hdl.handle.net/10803/284156.
Повний текст джерелаThis thesis is based on a type of photovoltaic devices; the dye sensitized solar cells (DSCs). In the last two decades, the study of these devices has been increased and currently results with over 13% efficiency have been published. The first chapter discusses the various components of this kind of device, its function and its components. It is also explained how these cells work and all the reactions and physical phenomena that take place. The second chapter explains how to prepare these devices and how are characterized. And the third, fourth, fifth and sixth chapters are based on diverse articles published and the difference between them is the kind of dye. In chapter 3, the dyes used are porphyrins, chapter 4 is based on phthalocyanines, chapter 5 is centred on organic dyes that have a structure called donor-acceptor with a π-bridge type in between and chapter 6 studies two ruthenium complexes.
Ruiz, Raga Sonia. "Advanced Studies on Dye-Sensitized Solar Cells." Doctoral thesis, Universitat Jaume I, 2013. http://hdl.handle.net/10803/396360.
Повний текст джерелаConvertir la llum solar en electricitat és una de les maneres més prometedores d'obtindre energía, ja que és inesgotable i disponible arreu del món. Primer és necessari desenvolupar dispositius fotovoltaics què siguin eficients, estables i de baix cost, i així poder competir en el mercat amb les actuals cèl·lules solars de silici. Les cèl·lules solars sensitivitzades amb colorant (DSC) ja han assolit eficiències per sobre del 12% amb materials i processos de fabricació senzills i barats. Les DSC recol·lecten la llum gracies a unes molècules fotoactives (colorant) i extrauen les càrregues a través de diferents materials semiconductors. Analitzar els principis de funcionament d'aquests dispositius és essencial per a assolir futures millores en eficiència i estabilitat. L'objectiu d'aquesta tesi és analitzar i identificar les interaccións elèctriques entre els materials i interfases internes d'una DSC mitjançant l'espectroscopía d'impedància (IS). El treball proporciona una interpretació pràctica de la IS aplicada a les DSC i també altres idees per al desenvolupament de les DSC com ara l'ús de cristalls fotònics i la fabricació de moduls de gran àrea, com a primer pas per a una futura comercialització.
Nilsing, Mattias. "Computational Investigation of Dye-Sensitized Solar Cells." Doctoral thesis, Uppsala universitet, Avdelningen för kvantkemi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7673.
Повний текст джерелаJim, Wai-yan, and 詹煒炘. "Tin oxide based dye sensitized solar cells." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206431.
Повний текст джерелаpublished_or_final_version
Physics
Master
Master of Philosophy
Wills, Kathryn. "Copper dyes for dye-sensitized solar cells." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636545.
Повний текст джерелаEllis, Hanna. "Developing Environmentally Friendly Dye-sensitized Solar Cells." Doctoral thesis, Uppsala universitet, Fysikalisk kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-280291.
Повний текст джерелаLEANDRI, VALENTINA. "Organic materials for dye-sensitized solar cells." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/49809.
Повний текст джерелаGomes, Weverson Rodrigues. "Estudo sobre a estrutura eletrônica de ftalocianinas metaladas para aplicação em células solares sensibilizadas por corante." Universidade Federal de Uberlândia, 2012. https://repositorio.ufu.br/handle/123456789/17353.
Повний текст джерелаThe electronic properties of push-pull substituted, zinc(II) (ZnPc), aluminum(III) (AlPc), and ruthenium(II) (RuPc), metal-phthalocyanine derivatives, presenting two electron donating groups (diethylamine) and two electron withdrawing groups (carboxylic) was studied using the Density Functional Theory (DFT) with B3LYP exchange-correlation functional in the vacuum and under the presence of solvent (DMSO), aiming their application in dye-sensitized solar cells (DSSC). For the excited states, the time-dependent approach of DFT (TD-DFT) was applied. In the transition for the excited state it was evidenced a charge transfer from donor to acceptor groups which results in large electronic rearrangement inducing the bathochromism when adding DMSO (a polar solvent). This electronic transfer is directed to the acceptor groups (benzoic groups), mainly in RuPc molecule, which enables bigger probability in the electronic injection into the semiconductor s conduction band. HOMO s energy to the ZnPc and AlPc are sufficiently below the redox potential of the electrolyte and LUMO s energy, in all compounds, is above the conduction band of the oxide. Those push-pull molecules present panchromism, important for the application of these compounds in DSSC since they can absorb photons in a large range of energies. NBO analysis suggests that the ruthenium presents strong coordination with the nitrogen atoms of the macrocycle, which allows a larger participation of this metal in the electronic transition. The ionization energy and electron affinity were calculated aiming to quantify the energetic barrier in the electron gain / loss.
As propriedades eletrônicas de derivados de ftalocianinas metaladas push-pull de zinco(II) (FtZn), alumínio(III) (FtAl) e rutênio(II) (FtRu) apresentando dois grupos doadores de elétrons (N,N-dietilanilina) e dois grupos retiradores de elétrons (ácido benzóico), foram estudadas usando a teoria do funcional de densidade (DFT) com o funcional híbrido B3LYP na presença do solvente (DMSO) e no vácuo, visando sua aplicação em células solares sensibilizadas por corante (CSSC). Para a descrição dos estados excitados usou-se a extensão dependente do tempo da DFT (TD-DFT). Na transição para o estado excitado destes compostos há uma transferência de carga dos grupos doadores para os grupos aceptores, que resulta em rearranjo eletrônico induzindo o efeito batocrômico observado com a adição de DMSO. Essa transferência eletrônica está direcionada para o grupo aceptor (grupo benzóico), principalmente na FtRu, que possibilita uma maior probabilidade na injeção eletrônica na banda de condução do semicondutor. A energia do HOMO para a FtZn e FtAl estão suficientemente abaixo do potencial redox do eletrólito e o LUMO, em todos os compostos, está acima da banda de condução do TiO2. Essas moléculas push-pull apresentam pancromismo, importante para a aplicação destes compostos em CSSC uma vez que podem absorver fótons de diferentes energias. Análises NBO sugerem que o rutênio apresenta forte coordenação com os nitrogênios do macrociclo que possibilita grande participação deste metal nestas transições eletrônicas. As energias de ionização e eletroafinidades foram calculadas com o objetivo de quantificar a barreira energética no ganho/perda de um elétron.
Mestre em Química
Zhang, Jian. "INVESTIGATION OF THE EFFECTS OF LAYER THICKNESS ON DYE SENSITIZED SOLAR CELL PERFORMANCE." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1377132624.
Повний текст джерелаAnwar, Hafeez. "Precious Metal-free Dye-sensitized Solar Cells." 2013. http://hdl.handle.net/10222/42686.
Повний текст джерелаWei, Chia-Chih, and 魏嘉志. "Fabrication of Dye-Sensitized Solar cells (DSSC) by Thermal Spray." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/19084148568535359580.
Повний текст джерела國立交通大學
理學院應用科技學程
100
A dye-sensitized solar cell (DSSC) is a third generation solar cell, and it owns a lot of characteristics such as easy fabrication, low cost, colorful expression and flexibility. Thermal Spray technology has been developed for hundreds of years, and applied to various fields, such as conventional industries, electronics industries and aerospace industries. The thermal spray process which can produce high surface area products suits to high surface area demand. The fabrication and characterization of DSSC devices prepared by thermal spray process are discussed in this thesis. The three-dimensional TiO2 nanotube(TNT) structure was successfully grown on the mesoporous Ti layers fabricated by thermal spray process, and served as photoanode materials for a TNT based DSSC. The cell performance of the TNT-DSSC shows an overall power conversion efficiency η=2.18%.
Lee, Te-Lung, and 李德龍. "Characterization of Dye-Sensitized Solar Cells (DSSC) Based on Porphyrin Derivatives (BPP)." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/13064808883768262371.
Повний текст джерела國立中興大學
物理學系所
95
In this research, we study three kinds of derivative of new porphyrin –BPP [5,15-Bis(4-carboxylicphenyl) porphyrinato) zinc (II ) ] as the dyes of Dye-Sensitized Solar Cells (DSSCs). The new BPP dyes can absorb more solar light with a broader wavelength range. We prepared nanocrystalline TiO2 films from four kinds of TiO2 paste, and used N3 dye as the sensitizer for a basic production method of DSSCs. We were able to get a conversion efficiency of 6.4% using the Dyesol paste. The absorption spectra of [2-3-4N,N-Bia(4-methoxylphenyl)-N- (4-ethynylphenyl)amine] substituted BPP shift down to lower energies as the number of substituent is increased. The B band main absorption peak shifts from 413 to 451 nm (one substitute) and 472 nm (two substitutes); the Q band main absorption peak shifts from 543 to 624 nm (one substitute) and 676 nm (two substitutes). We report the current-voltage characteristic curves, fill factor (FF), shirt-circuit current Isc, open-circuit voltage Voc, and conversation efficiency η under the standard conditions of AM 1.5 incident light with 100 mW/cm2 power for the three types of porphyrin-derivative DSSCs . The parent BPP dye has the highest solar-to-energy conversion efficiency of η = 0.46%, and FF = 61.1%, ISC = 0.113 mA, VOC = 0.563 V were obtained.
Tsai, Jyh-Hong, and 蔡志宏. "Nano-porous TiO2 Films on Dye-Sensitized Solar Cells(DSSC) by Process and Characteristic AnalysisNano-porous TiO2 Films on Dye-Sensitized Solar Cells(DSSC) by Process and Characteristic Analysis." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/62205206355254143554.
Повний текст джерела中華大學
機械與航太工程研究所
94
This paper mainly is discusses the TiO2 nano-porous thin film to the dye-sensitized solar cells uses on the soft substrate each characteristic discusses, including TiO2 nano conductivity layer manufacture, platinum electrode manufacture, transparent electric conduction membrane manufacture and diaphanous rate analysis, dye and electrolyte analysis. Spreads to apply shaving law using the tradition to manufacture the TiO2 light electrode, by the different size nano-particle, separately manufactures the dye-sensitized solar cells on the glass substrate and the soft plastic substrate. annealing in the high temperature on the glass substrate by 500 ℃, 150 ℃ annealing experiment, the soft plastic substrate because is unable to use the high temperature to annealing, therefore only can by 150 ℃ annealing experiment; But at present the question which meets in the manufacture, the TiO2 light electrode use anneal on the soft plastic substrate easily to create the TiO2 peeling phenomenon, must coordinates in the choice of material and the temperature control. This experiment has succeeded on the glass substrate and the soft plastic substrate makes the TiO2 nano-porous thin film to the dye-sensitized solar cells, but the efficiency was still somewhat low, is unable to achieve the commercialized scale. Future will be supposed to follow asks the material and the process regulation best composition, will be able the solar cells display to the optimum condition.
Yen, Chuan-Yu, and 顏銓佑. "Preparation and Properties of Carbon Nanotubes/Nanocomposite for Dye-Sensitized Solar Cells (DSSCs)." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/99813742366152805097.
Повний текст джерелаMbonyiryivuze, Agnes. "Indigenous natural dyes for Gratzel solar cells : Sepia melanin." Diss., 2014. http://hdl.handle.net/10500/19034.
Повний текст джерелаPhysics
1 online resource (xii, 101 leaves) : illustrations
M. Sc. (Physics)