Дисертації з теми "Metal-oxide solar cells"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Metal-oxide solar cells".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Sun, Haiyan. "Metal oxide layer in organic solar cells." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-147159.
Повний текст джерелаDharmadasa, Ruvini. "Studies of composite metal oxide based ETA solar cells." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/9117.
Повний текст джерелаZhu, Le. "Development of metal oxide solar cells through numerical modeling." Thesis, University of Bolton, 2012. http://ubir.bolton.ac.uk/810/.
Повний текст джерелаKatz, Jordan E. Okumura Mitchio Lewis Nathan Saul. "Metal oxide-based photoelectrochemical cells for solar energy conversion /." Diss., Pasadena, Calif. : California Institute of Technology, 2008. http://resolver.caltech.edu/CaltechETD:etd-10192007-190231.
Повний текст джерелаPachoumi, Olympia. "Metal oxide/organic interface investigations for photovoltaic devices." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/246263.
Повний текст джерелаBhosale, R. K. "Engineered metal oxide and chalcogenide nanomaterials for sensitized solar cells and solar photoelectrochemical water splitting." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2015. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2038.
Повний текст джерелаWillis, Richard Lance. "Functional properties of nanocrystalline metal oxide films for dye sensitised solar cells." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398946.
Повний текст джерелаRattanavoravipa, Thitima. "Studies on surface modification of nanostructured metal oxide for hybrid solar cells." Kyoto University, 2009. http://hdl.handle.net/2433/126414.
Повний текст джерела0048
新制・課程博士
博士(エネルギー科学)
甲第14965号
エネ博第208号
新制||エネ||46(附属図書館)
27403
UT51-2009-M879
京都大学大学院エネルギー科学研究科エネルギー基礎科学専攻
(主査)准教授 佐川 尚, 教授 八尾 健, 教授 萩原 理加
学位規則第4条第1項該当
Berhe, Seare Ahferom. "Acceptor-sensitizers for Nanostructured Oxide Semiconductor in Excitonic Solar Cells." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc699927/.
Повний текст джерелаHaynes, 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 джерелаLabanti, Chiara. "Electronic properties of transition metal oxide layers for applications in organic solar cells." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15984/.
Повний текст джерелаSun, Haiyan [Verfasser], and Lukas [Akademischer Betreuer] Schmidt-Mende. "Metal oxide layer in organic solar cells / Haiyan Sun. Betreuer: Lukas Schmidt-Mende." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1025224418/34.
Повний текст джерелаWu, Zhenghui. "Impact of metal oxide/bulk-heterojunction interface on performance of organic solar cells." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/159.
Повний текст джерелаBowers, Norman Mark. "Metal oxide nanocrystalline thin films as buffer layers in organic/ hybrid solar cells." University of Western Cape, 2019. http://hdl.handle.net/11394/7698.
Повний текст джерелаWithout reverting to encapsulation, organic bulk - heterojunction solar cells can be protected from the oxidation of the highly reactive low work function cathode metal electrode, by the deposition of metal oxide buffer layers onto an indium-tin oxide (ITO) substrate. The zinc-oxide (ZnO) or titanium dioxide (TiO2) layer can serve as an electron collecting contact. In such a case the ordering of layer deposition is inverted from the traditional layer sequencing, using an additional effect of the metal oxide layer acting as a hole blocking contact
SCIRE', Daniele. "TRANSITION METAL OXIDES AS SELECTIVE CONTACTS FOR C-SI SOLAR CELLS." Doctoral thesis, Università degli Studi di Palermo, 2021. http://hdl.handle.net/10447/514988.
Повний текст джерелаIp, Chung Man. "Theoretical studies in dye-sensitized solar cells and photo-catalysis at metal oxide interfaces." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/87995/.
Повний текст джерелаLima, Francisco Anderson de Sousa. "Application of transition-metal-oxide-based nanostructured thin films on third generation solar cells." reponame:Repositório Institucional da UFC, 2015. http://www.repositorio.ufc.br/handle/riufc/14584.
Повний текст джерелаSubmitted by Marlene Sousa (mmarlene@ufc.br) on 2015-12-17T12:45:41Z No. of bitstreams: 1 2015_tese_faslima.pdf: 24015209 bytes, checksum: a66470eb7a55b6b3c2a5e8544c6d4d32 (MD5)
Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2015-12-18T12:18:53Z (GMT) No. of bitstreams: 1 2015_tese_faslima.pdf: 24015209 bytes, checksum: a66470eb7a55b6b3c2a5e8544c6d4d32 (MD5)
Made available in DSpace on 2015-12-18T12:18:53Z (GMT). No. of bitstreams: 1 2015_tese_faslima.pdf: 24015209 bytes, checksum: a66470eb7a55b6b3c2a5e8544c6d4d32 (MD5) Previous issue date: 2015-10-30
One of the greatest challenges of our time is to devise means to provide energy in a sustainable way to attend an exponentially growing demand. The energy demand is expected to grow 56% by 2040. In this context, the use of clean and sustainable sources of energy is imperative. Among these sources, solar energy is the only one which can meet the total world energy requirement even considering such large growth in demand. The solar power incident on the Earth's surface every second is equivalent to 4 trillion 100-watt light bulbs. Photovoltaic solar cells are one of several ways to harness solar energy. These cells convert solar energy directly into electricity. Commercial photovoltaic devices are already a reality, but their share of the world energy matrix is still quite small, mainly due to the high costs. Next generation photovoltaics open a number of new possibilities for photovoltaic energy applications that can potentially decrease the overall cost of energy production. Transition metal semiconductor oxides are promising materials that can be produced by low cost methods and o er interesting new features. The use of these materials in next generation photovoltaics is therefore a very promising and interesting application. In this thesis work zinc, titanium and vanadium oxides were used in next generation solar cells. Thin lms of zinc oxide were synthesized by the low cost and environmentally friendly techniques of electrodeposition and hydrothermal synthesis and applied as working electrodes in highly e cient dye sensitized solar cells (DSSCs). The lms were characterized by structural and optical techniques while the cells were tested by current vs: voltage and quantum e ciency measurements. The e ciencies of these cells were as high as 2.27% using ZnO thin lms without any post deposition treatment. Moreover, natural dyes extracted from plants of northeastern Brazil were applied as sensitizers in DSSCs assembled with commercial available TiO 2 as working electrode. The natural dyes were extracted employing very simple methods and were characterized by XPS and UPS techniques. Their band alignments were shown to be compatible with the TiO 2 as well as with the mediator electrolyte. The e ciency of DSSCs sensitized with natural dyes were as high as 1.33%. Finally, water based V 2 O 5 was used as hole transport medium (HTM) in conventional organic solar cells (OSCs) and ITO-free, plastic OSCs. The results obtained with V 2 O 5 were compared with the results obtained from cells assembled with PEDOT:PSS, which is the most used HTM. This comparison showed that the use of V 2 O 5 as HTM can lead to more e cient OSCs. The stability of these devices were evaluated by tests applying the ISOS standards ISOS-D-1, ISOS-L-1 and ISOS-O-1. A UV- lter and a protective graphene oxide (GO) layer were employed seeking to improve the stability of OSCs. The combination of both UV- lter and GO protective layer was shown to be the most e ective way to improve the stability of these devices
Um dos maiores desa os do nosso tempo e desenvolver formas para fornecer energia de forma sustent avel para atender uma demanda que cresce exponencialmente e que dever a crescer 56% at e 2040. Neste contexto, o uso de fontes limpas e sustent aveis de energia e um imperativo. Entre essas fontes, a energia solar e a unico que pode satisfazer a ne- cessidade total de energia do mundo, mesmo considerando o crescimento na demanda. A pot^encia solar incidente na superf cie da Terra a cada segundo e equivalente a 4 trilh~oes de l^ampadas de 100 watts. C elulas solares fotovoltaicas s~ao uma das v arias maneiras de aproveitar a energia solar, convertendo-a diretamente em eletricidade. Dispositivos com- erciais fotovoltaicos j a s~ao uma realidade, mas a sua participa c~ao na matriz energ etica mundial ainda e muito pequena, principalmente devido aos seus custos elevados. C elulas fotovoltaicas de nova gera c~ao abrem uma s erie de novas possibilidades para aplica c~oes de energia fotovoltaica que pode diminuir o custo total de produ c~ao de energia. Oxidos semicondutores de metais de transi c~ao s~ao materiais promissores que podem ser produzi- dos atrav es de m etodos de baixo custo e que possuem caracter sticas interessantes. Por conseguinte, o uso destes materiais em energia fotovoltaica de pr oxima gera c~ao se apre- senta com uma aplica c~ao promissora. Nesta tese de doutorado oxidos de zinco, tit^anio e van adio foram utilizados em c elulas solares de pr oxima gera c~ao. Filmes nos de oxido de zinco foram sintetizados por eletrodeposi c~ao e s ntese hidrot ermica. Os lmes foram apli- cados como eletrodos de trabalho em c elulas solares sensibilizadas por corante (DSSCS) altamente e cientes. Os lmes foram caracterizados por t ecnicas estruturais e oticas en- quanto que as c elulas foram testadas por medidas de corrente vs: voltagem e de e ci^encia qu^antica. A e ci^encia dessas c elulas atingiu 2,27% utilizando lmes nos de ZnO sem qualquer tratamento p os-deposi c~ao. Al em disso, corantes naturais extra dos de plan- tas do nordeste do Brasil foram aplicados como sensibilizadores em DSSCs montadas com TiO 2 comercial utilizado como eletrodo de trabalho. Os corantes naturais foram extra das empregando m etodos simples e foram caracterizados por espectroscopia de fotoel etrons excitados por raios X e por radia c~ao ultravioleta, XPS e UPS respectivamente. Seus alin- hamentos de banda se mostraram compat veis com o TiO 2 e com o eletrodo de regenera c~ao. A e ci^encia das DSSCs sensibilizadas com corantes naturais chegou a 1,33%. Finalmente, V 2 O 5 a base de agua foi usado como material transportador de buracos (HTM) em c elulas solares org^anicas (OSCs) convencionais e OSCs de pl astico constru das sem ITO. Os re- sultados obtidos com V 2 O 5 foram comparados com os resultados de c elulas constru das com PEDOT:PSS, que e o HTM mais utilizado. Esta compara c~ao revelou que o uso de V 2 O 5 como HTM pode levar a OSCs mais e cientes. A estabilidade destes dispositivos foi avaliada por testes aplicando os padr~oes ISOS-D-1, ISOS-L-1 e ISOS-O-1. O uso de ltros ultravioleta e de uma camada protetora de oxido de grafeno reduzido foi testado com o intuito de melhorar a estabilidade desses dispositivos. O uso de uma combina c~ao de ambos se mostrou a forma mais efetiva de melhorar a estabilidade das OSCs
Sporar, Daniel. "Sputter Deposition of Iron Oxide and Tin Oxide Based Films and the Fabrication of Metal Alloy Based Electrodes for Solar Hydrogen Production." Connect to Online Resource-OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1183481021.
Повний текст джерелаTypescript. "Submitted as partial fulfillment of the requirements for The Master of Science degree in Chemical Engineering." Bibliography: leaves 72-77.
Yip, Cho-tung, and 葉佐東. "Effect of morphologies and electronic properties of metal oxide nanostructure layer on dye sensitized solar cells." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43759452.
Повний текст джерелаYip, Cho-tung. "Effect of morphologies and electronic properties of metal oxide nanostructure layer on dye sensitized solar cells." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B43759452.
Повний текст джерелаFu, Qiang. "Advanced numerical characterization of silicon with defect by nanoindentation." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/54621/1/Qiang_Fu_Thesis.pdf.
Повний текст джерелаLadan, Muhammad Bello. "Application of vertically aligned arrays of metal-oxide nanowires in heterojunction photovoltaics." University of the Western Cape, 2020. http://hdl.handle.net/11394/7915.
Повний текст джерелаThe commercial need to improve the performance of low-cost organic solar cells has led to the idea for this research. The study discusses the synthesis of one dimensional TiO2 and ZnO nanowire arrays synthesised using a hydrothermal autoclave method and their application in bulk heterojunction inverted organic solar cells. Previous literature has shown that the precise manipulation, positioning and assembly of 1D nanostructures remain one of the greatest challenges in the field of nanotechnology, with much of the difficulty arising primarily from the lack of size and scale of the materials as well as the inability to visualise the nanostructures. In particular, one dimensional metal-oxides such as TiO2, ZnO and Fe2O3 have emerged as attractive alternatives to traditional semiconductor structures such as Si and GaAs as they are simple and inexpensive to manufacture, with research showing that application of ZnO nano-cones yield efficiencies of 8.4%, which is very attractive given the scope that exists in optimising the metal-oxide architecture. Much is still to be learned from the precise structural features of these materials and their influence on device performance. In this regard, this work largely focuses on this aspect of metal-oxide nanowires prior their application in organic solar cells.
Möllmann, 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.
Повний текст джерелаZhu, Zhaozhao, and Zhaozhao Zhu. "Emerging Materials for Transparent Conductive Electrodes and Their Applications in Photovoltaics." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/623062.
Повний текст джерелаSahu, Gayatri. "Investigating the Electron Transport and Light Scattering Enhancement in Radial Core-Shell Metal-Metal Oxide Novel 3D Nanoarchitectures for Dye Sensitized Solar Cells." ScholarWorks@UNO, 2012. http://scholarworks.uno.edu/td/1478.
Повний текст джерелаMadani, Sepideh Sadat. "Investigation of charge transport metal oxides for efficient and stable perovskite solar cells." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/235892/1/Sepideh%2BSadat%2BMadani%2BThesis%282%29.pdf.
Повний текст джерелаWang, Zixin. "TOWARDS HIGH-PERFORMANCE PEROVSKITE SOLAR CELLS BY CATHODE INTERFACIAL ENGINEERING WITH TERNARY METAL OXIDE AND DEVICE ENGINEERING WITH BULK HETROJUNCTION." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron149520580193777.
Повний текст джерелаRen, He. "Towards High Performance Pedot: PSS-Free Polymer Solar Cells with Solution-Processed Metal Oxide Thin film as Hole Extraction Layer." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1406378486.
Повний текст джерелаAli, Fawad. "Investigation of metal oxides thin films developed by PVD system for perovskite solar cells." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/127139/1/Fawad_Ali_Thesis.pdf.
Повний текст джерелаDas, Saikat. "FUNDAMENTAL STUDIES OF SURFACTANT TEMPLATED METAL OXIDE MATERIALS SYNTHESIS AND TRANSFORMATION FOR ADSORPTION AND ENERGY APPLICATIONS." UKnowledge, 2015. http://uknowledge.uky.edu/cme_etds/48.
Повний текст джерелаNatu, Gayatri. "Design and Synthesis of Metal Oxide Nanomaterials and Study of Their Electronic Properties for Energy Conversion via Dye-sensitized Solar Cells." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343823995.
Повний текст джерелаPark, Eunsol. "Synthesis of Tethering Group on Borylazadipyrromethene Dyes to Apply to Photogalvanic Dye-sensitized Solar Cells." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700072/.
Повний текст джерелаAugustine, B. (Bobins). "Efficiency and stability studies for organic bulk heterojunction solar cells." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526214436.
Повний текст джерелаTiivistelmä Orgaanisten heteroliitosaurinkokennojen kerrosrakenteen ominaisuudet ja laatu vaikuttavat merkittävästi aurinkokennojen toiminnallisuuteen. Erityisesti rakenteelliset epähomogeenisuudet aktiivi- ja puskurikerroksissa heikentävät kennon hyötysuhdetta. Kennojen stabiilisuutta tarkasteltaessa myös mekaanisella rasituksella, pitkittyneellä lämpöaltistuksella ja materiaalien reagoinneilla keskenään kerrosten välillä, on selkeä negatiivinen vaikutus kennojen stabiilisuuteen. Orgaanisen aurinkokennoteknologian kaupallistamisen rajoitteina ovat kennojen heikko hyötysuhde ja stabiilisuus, joten menetelmät jotka tarjoavat ratkaisuja edellä mainittuihin ongelmiin, ovat erittäin tärkeitä teknologiaa kaupallistavalle teollisuudelle. Tämä väitöskirja keskittyy johdonmukaisesti selvittämään tapoja, joilla voidaan parantaa heteroliitosaurinkokennojen hyötysuhdetta ja elinikää. Hyötysuhteen tehostamiseksi valittiin kaksi eri lähestymistapaa, joista ensimmäisessä keskityttiin aktiivikerroksen morfologian parantamiseen ja toisessa aukkoja kuljettavan kerroksen sähköisten ominaisuuksien parantamiseen lämpökäsittelyprosessin avulla. Sopivan lisäaineen avulla aktiivikerroksen ei-toivottua kiteytymistä voidaan pienentää ja parantaa näin kerroksen morfologiaa. Lisäksi työssä todettiin, että lämpökäsittelyn aikaisella ympäristöolosuhteella (ilma, typpi, tyhjiö) on merkittävä vaikutus puskurikerroksen optimaaliseen toimintaan aurinkokennossa. Stabiilisuuden parantamiseksi kehitettiin välikerroksen hyödyntämiseen perustuva menetelmä, jolla voidaan tehokkaasti vähentää kennojen sisäisessä rakenteessa tapahtuvaa toiminnallisuuden heikkenemistä, joka aiheutuu aukkoja kuljettavan kerroksen syövyttävästä vaikutuksesta indiumtinaoksidi (ITO) pohjaiseen anodiin. Tämän lisäksi työssä tutkittiin kokeellisesti stabiilisuuteen heikentävästi vaikuttavia tekijöitä, kuten mekaanisen rasituksen aiheuttamia vaurioita metallioksidi (ITO) anodissa ja lämpöaltistuksesta aiheutuvia vikoja polymeeri-fullereeni rakenteeseen perustuvassa aktiivikerroksessa. Tutkimuksen keskeisin tulos on, että esitellyt keinot aurinkokennojen hyötysuhteen ja stabiilisuuden parantamiseen ovat edullisia, tehokkaita ja helppoja hyödyntää. Tulokset voivat merkittävästi edistää orgaanisten aurinkokennojen teknistä kehitystä ja kiihdyttää niiden tuloa kaupallisiksi tuotteiksi
Chistiakova, Ganna [Verfasser], Bernd [Akademischer Betreuer] Rech, Klaus [Gutachter] Lips, Uwe [Gutachter] Rau, and Bernd [Gutachter] Rech. "Development of metal oxide thin films as carrier selective contacts for silicon heterojunction solar cells / Ganna Chistiakova ; Gutachter: Klaus Lips, Uwe Rau, Bernd Rech ; Betreuer: Bernd Rech." Berlin : Technische Universität Berlin, 2020. http://d-nb.info/1210998440/34.
Повний текст джерелаFan, Liangdong. "Development and characterization of functional composite materials for advanced energy conversion technologies." Doctoral thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134111.
Повний текст джерелаQC 20131122
Cojocaru, Ludmila. "Films d’oxydes semi-conducteurs nanoporeux et nanocristallins pour dispositifs photovoltaïques hybrides." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14630/document.
Повний текст джерелаIn the context of the development of efficient, low-cost and environmentally friendly photovoltaic devices, the synthesis of metal-oxide semiconductors such as SnO2, Zn2SnO4 and WO3 with various textures and morphologies have been developed in order to achieve nanoporous photoanodes for dye-sensitized solar cells. According to studies carried out by different characterization methods (SEM, TEM, XRD and BET), the resulting materials show interesting features for the expected application. Dye solar cells were then fabricated from photoanodes processed with these oxides and several parameters influencing their performance were optimized to improve the overall conversion efficiency. In particular, the beneficial effect of different treatments of the photoanodes (ie aqueous TiCl4 or water treatment) on the power conversion efficiency and the stability of the devices has been evidenced. Thus, state-of-the art or, even, record efficiencies were reached in the case of SnO2-based systems. These performances were then rationalized by determining the electronic and ionic processes occurring in these devices by various physical methods (threshold voltage and open-circuit photovoltage decay measurements, electrochemical impedance spectroscopy). Finally, electrodes based on WO3 and deposited on flexible substrates have shown very promising electrochromic properties, which opens up new prospects in the field of smart displays
Silva, Audrey Roberto 1964. "Texturização da superfície de silício monocristalino com NH4OH e camada antirrefletora para aplicações em células fotovoltaicas compatíveis com tecnologia CMOS = Texturing the surface of monocrystalline silicon with NH4OH and anti-reflective coating for applications in photovoltaic cells compatible with CMOS technology." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259291.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-21T10:50:41Z (GMT). No. of bitstreams: 1 Silva_AudreyRoberto_M.pdf: 3023922 bytes, checksum: ee750f675d01f2b3ceebd5d74149b16e (MD5) Previous issue date: 2012
Resumo: Este trabalho apresenta o desenvolvimento de células fotovoltaicas de junção n+/p em substratos de Si com processos de fabricação totalmente compatíveis com a tecnologia CMOS (Complementary Metal Oxide Semiconductor). Os processos compatíveis desenvolvidos neste trabalho sao as técnicas: i) de texturização da superfície do Si, com reflexao da superficie texturizada de 15% obtida com a formação de micro-pirâmides (alturas entre 3 e 7 ?m), utilizando-se solução alcalina de NH4OH (hidróxido de amônia), que e livre da contaminação indesejável por íons de Na+ e K+ quando se utiliza soluções tradicionais de NaOH e de KOH, respectivamente, e ii) de deposição ECR-CVD (Electron Cyclotron Resonance - Chemical Vapor Deposition) da camada antirrefletora (ARC) de SiNX (nitreto de silício), que e executada em temperatura ambiente, portanto pode ser feita apos a finalização da célula sem danificar trilhas metálicas e alterar a profundidade da junção n+/p. A caracterização desta camada ARC mostrou que o nitreto tem índice de refração de 1,92 e refletância mínima de 1,03%, o que e um excelente resultado para uso em células solares (ou fotovoltaicas). Foram fabricadas cinco series de células fotovoltaicas, utilizando-se a texturização com NH4OH e a camada antirrefletora de nitreto de Si. Em quatro series utilizou-se o processo de implantação de íons de fósforo (31P+), com posterior recozimento, para a formação da região n+, enquanto que na quinta serie foi utilizado o processo de difusão térmica. As eficiências máximas para as células fabricadas são de 9% e de 12%, respectivamente, para as células feitas utilizando os processos de implantação e de difusão térmica, indicando que a implantação de íons causa danos na rede cristalina do silício, que o posterior recozimento não consegue corrigir, o que reduz a eficiência da célula
Abstract: This work presents the development of photovoltaic cells based on n+/p junction in Si substrates, with fully compatible fabrication processes with CMOS technology. The compatible processes, which are developed in this study, are the techniques: i) of Si surface texturing, with the textured surface reflection of 15% obtained by the formation of micro-pyramids (heights between 3 and 7 ?m) using NH4OH (ammonium hydroxide) alkaline solution, which is free of undesirable contamination by Na + and K + ions, when NaOH and KOH traditional solutions are used, respectively, and ii) of the ECR-CVD (Electron Cyclotron Resonance - Chemical Vapor Deposition) deposition of SiNx (silicon nitride) anti-reflective coating (ARC), which is carried out at room temperature and can be performed after the end of cell fabrication without damage on metallic tracks and without variation of n+/p junction depth. The ARC coating characterization presented that the silicon nitride has a refractive index of 1.92 and a minimum reflectance of 1.03%, which is an excellent result for application in solar (or photovoltaic) cells. Five series of photovoltaic cells were fabricated, using the NH4OH solution texturing and the silicon nitride antireflective coating. In the first four series, phosphorus (31P+) ion implantation process, with subsequent annealing to get the region n+, was used, while, in the fifth series was used the thermal diffusion process. The maximum efficiency values are of 9% and 12%, respectively, for cells, which were fabricated using the ion implantation and thermal diffusion processes, indicating that the ion implantation damages the silicon crystal lattice and the subsequent annealing cannot rectify, which reduces the cell efficiency
Mestrado
Eletrônica, Microeletrônica e Optoeletrônica
Mestre em Engenharia Elétrica
Ghamgosar, Pedram. "Advanced Metal Oxide Semiconductors for Solar Energy Harvesting and Solar Fuel Production." Licentiate thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-64922.
Повний текст джерелаBesharat, Zahra. "Adsorption of molecular thin films on metal and metal oxide surfaces." Doctoral thesis, KTH, Materialfysik, MF, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-195613.
Повний текст джерелаQC 20161107
LAMBERTI, ANDREA. "Metal-oxide nanostructures for energy applications." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2506221.
Повний текст джерелаWang, Chenggong. "Interface Studies of Organic/Transition Metal Oxide with Organic Semiconductors and the Interfaces in the Perovskite Solar Cell." Thesis, University of Rochester, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3723336.
Повний текст джерелаIn recent decades, research and development of organic based semiconductor devices have attracted intensive interests. One of the most essential elements is to understand the electronic structures at various interfaces involved in these devices since the interface properties control many of the critical electronic processes. It is thus necessary to study the electronic properties of the organic semiconductors with surface analytical tools to improve the understanding of the fundamental mechanisms involved in the interface formation. This thesis covers the experimental investigations on some of the most interesting topics raised in the recent development of organic electronic devices. The thesis intends to reveal the physical processes at the interface and their contribution to the device performance with photoemission and inverse photoemission investigations on the evolution of the occupied and unoccupied electronic structures. I will report a substantial difference in the electron affinity of CuPc on two substrates as the orientations of CuPc are different. I will also illustrate that the CuPc has standing up configuration on one monolayer of C60 on SiO2 while lying down on one monolayer of C60 on HOPG. Meanwhile, the CuPc on more than one monolayers of C60 on different substrates show that the substrate orientation effect vanished. Then I will propose a two-stage model to describe the bulk doping effect of C60 by molybdenum oxide. I will also demonstrate that the doping effect of C60 by ultra-thin layer molybdenum oxide is weaker than that by interface doping and bulk doping. I will demonstrate that for Au on CH3NH3PbI3, hole accumulation occurs at the vicinity of the interface, facilitating hole transfer from CH3NH3PbI3 to Au. I will show a strong initial shift of core levels to lower binding energy in C60 on CH3NH3PbI3 interface, which indicates that electrons transfer from the perovskite film to C60 molecules. I will further demonstrate that the molybdenum oxide surface can be passivated by approximately two monolayers of organic thin films against exposure to air. I will discuss the mechanism that how oxygen plasma treatment effectively recover the high work function drop of molybdenum oxide by air exposure. At the end, I will show that a small energy offset at Pentacen/C60 heterojunction makes it easy to transfer electrons from Pentacene to C60 even under a small applied bias, facilitating the occurrence of charge generation. Finally, I will summarize the thesis.
Makineni, Anil Kumar. "Construction and realisation of measurement system in a radiation field of 10 standard suns." Thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-17209.
Повний текст джерелаStrandberg, Leo, and Zivojin Mirovic. "Hållbar kraftförsörjning av signalanläggningar : En undersökning av Roslagsbanans signalsäkerhetsutrustning." Thesis, KTH, Hälsoinformatik och logistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230635.
Повний текст джерелаRoslagsbanan's signal systems have several different solutions for its power supply in the form of several standards for batteries and rectifiers. This solution variation has made it difficult for maintenance staff to correct the errors that occurred and thus delayed traffic, i.e. traffic disturbances. Roslagsbanan is partly supplied by local power grids where interruptions occur occasionally. These interruptions often occur when the network service providers maintain their home network, which may also occur during rush hour traffic. The interruptions can also be caused by the signal systems them self when large voltage variations occur, e.g. when large inductive or capacitive loads are switched off. These problems are analysed, and action proposals are presented in this report. The existing rectifiers and batteries as well as proposals for replacement products that are needed for this safety system have been compiled in this report. To create a sustainable, robust and environmentally friendly power supply to Roslagsbanan’s signal systems, this work investigated transients, uninterruptible power supply, as well as the possibility of connecting solar cells as a complementary arrangement. An investigation of the signal equipment at Roslags Näsby station area showed presence of transients. Two proposals to reduce these transients were presented. The proposals were a low pass filter and a metal oxide varistor, both individually reduces transients. The low pass filter attenuates the voltage and current of the signal when the strong frequency changes occurs and the metal oxide varistor reduces the current flow at overvoltages. Further investigations of the transients in Roslags Näsbys and the other signal facilities on the Roslagsbanan should be performed. On the other hand, the results of the investigations on uninterruptible power and solar cells showed that the equipment should not be installed in the current signal systems. Solar cells were not implementable because the power requirement of the signal systems was greater than the current ceiling area for the solar cells. The work and investment for uninterruptible power supply maintenance and installation were more demanding in comparison to its usefulness for the reliability of the signal systems. Proposals for replacement products were submitted to employers to create a standard for Roslagbanan's power supply onwards.
Сигнални систем на железници која се зове Рослагсбана садржи више различитих решења за своје напајање у облику неколико стандарда за батерије и исправљаче. Варијација различитих решења проузроковала je потешкоће у отклањању новонасталих грешака служби које се баве одржавањем и изазвала је застој у железничком саобраћају. Рослагсбана се напаја електричном енергијом из локалних мрежа на којима може доћи до прекида. Прекид напајања електричном енергијом може бити изазван наглим променама напона у сигналним системима и уколико локални дистрибутер изводи радове на одржавању електричне мреже. Проблеми који могу настати променама напона се анализирају и испитују у овом извештају. Попис исправљача и батерија као и њихова стандардна решења су обрађени и представљени у циљу стварања одрживог и дугорочног решења за системску сигнализацију. Анализирани су високонапонски шпицеви, системи за непрекидно напајање електричном енергијом (УПС) и могућност прикључивања соларних панела. У сигналном систему на станици Рослас Насби измерени су високонапонски шпицеви. Како би се дошло до најбољег и најповољнијег решења анализирана су два предлога за њихово уклањање. Један предлог за уклањање био је ниско пропусни филтер док је за редукцију предложен метал- оксидни одводник пре напона (МОВ). Ниско пропусни филтер смањује јачину струје и напона уколико фреквенција пређе одређену претходно утврђену границу, док МОВ редукује ток струје уколико дође до скока напона. Пре имплементације било ког од наведених решења треба извршити накнадна испитивања у вези са напонским шпицевима. Резултати указују да имплементација УПС-а и соларних панела није могућа. Могућност соларних панела да произведу довољну количину енергије која је потребна за одређени систем није сразмерна површини система која би могла да се прекрије соларним панелима. Трошкови одржавања и прикључивања УПС система су већи у поређењу са значајем које би систем имао од самог УПС система. Предлог стандардних батерија и исправљача који је представљен послодавцу коригован је како би се дошло до стандардног решења за све предстојеће пројекте.
Vedraine, Sylvain. "Intégration de nanostructures plasmoniques au sein de dispositifs photovoltaïques organiques : étude numérique et expérimentale." Phd thesis, Aix-Marseille Université, 2012. http://tel.archives-ouvertes.fr/tel-00799088.
Повний текст джерелаBou, Adrien. "Electrodes multifeuillets de type oxyde/métal/oxyde à transparence accordable pour cellules solaires organiques." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4367.
Повний текст джерелаAmong all variants of photovoltaic thins films, organic solar cells generate a major industrial interest due to low manufacturing costs, reasonable levels of energy production and suitability to flexible substrates like plastic. ITO (Indium Tin Oxide) is the most used Transparent Conductive Electrode (TCE) for organic solar cells as well as other optoelectronic devices. However, this material is not without drawbacks (scarcity of indium, non-suitability to flexible substrates...), and the search for alternatives to ITO is actively pursued by the international scientific community. One possibility is offered by Oxide|Metal|Oxide multilayer structures. By reaching the thin metal layer percolation threshold and by varying its thickness, it is possible to obtain very high conductivity and transparency of this multilayer in the visible spectral range. The role of both oxide layers is to tune the position, intensity and width of the spectral transmission window by adjusting the oxides’ thicknesses. Coupled experimental and numerical works were lead in particularly on SnOx|Ag|SnOx, TiOx|Ag|TiOx and ZnS|Ag|ZnS structures. By microstructuring such electrodes, or by incorporating a Cu|Ag bilayer as metal sheet at the core of the structure, it is possible to increase the optical performances by amplifying and expanding the spectral transmission window without degrading the high conductivity. The integration of SnOx|Ag|SnOx and TiOx|Ag|TiOx electrodes in inversed organic solar cells was undertaken. Very promising photoelectric results were obtained with the TiOx|Ag|TiOx structure which allows to reach performances close to that obtained with ITO-based reference cells
Katz, Jordan E. "Metal Oxide-Based Photoelectrochemical Cells for Solar Energy Conversion." Thesis, 2008. https://thesis.library.caltech.edu/4186/1/Jordan_Katz_Thesis2007.pdf.
Повний текст джерелаIn order to address the need for CO2-free energy, recent trends in global CO2 emissions and energy production are analyzed, and the photoelectrochemical properties of two types of metal oxide-based solar cells are presented.
The effects of potential-determining cations (Li+, H+) in the electrolyte of TiO2-based dye-sensitized solar cells, using Ru(H2L’)2(NCS)2, where H2L’ is 4,4’-dicarboxylic acid-2,2’bipyridine, as a sensitizer was investigated using current density vs potential (J-E), spectrochronocoulometric, and spectroscopic methods. Photoelectrochemical cells with lower concentrations of the cations Li+ and H+ had increased open-circuit voltages (Voc), and decreased short-circuit current densities (Jsc). Spectrochronocoulometric methods indicated that the energy of states in TiO2 shifted by approximately -1 V when in contact with electrolytes lacking small cations. Spectral response measurements indicated that the loss of photocurrent was accompanied by a nearly monotonic drop in the external quantum yield across all wavelengths.
Transient absorption spectroscopy was used to measure the kinetics of interfacial electron transfer of the same system. No dependence was observed on the ultrafast dynamics of electron injection on cations used in ClO4--based solutions. However, in solutions of TBA+ with I3-/I-, femtosecond, but not picosecond, dynamics were observed. In contrast, for solutions with Li+ and ClO4-, I- or I-/I3-, both femtosecond and picosecond dynamics were observed. Nanosecond-resolved spectroscopy results show that the absence of small cations did not affect the rate of recombination, while the regeneration rate of [RuIII(H2L’)2(NCS)2]+ was decreased. Results indicate that both the ground and excited state reduction potentials of the sensitizer shift as a function of small cations in solution, along with the energy of states in TiO2. The efficiency of electron injection is thus largely unchanged; rather a decrease in the regeneration rate accounts for the loss of Jsc.
Finally, a novel, high-throughput, combinatorial approach for the synthesis and screening of mixed-metal oxides for use as water-splitting photocatalysts was developed. The methodology relies on inkjet printing to form quantitative mixtures of aqueous metal oxide precursors. After pyrolysis, the photoelectrochemical properties of metal oxides can be fully characterized in an automated high-speed system, including measurement of the Voc and J-E curves.
Lee, Yu-Tsu, and 李佑祖. "Nanometer metal oxide layer on silicon for heterojunction solar cells." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/17640680040796321517.
Повний текст джерела國立中興大學
電機工程學系所
105
We demonstrated a high performance Si-organic hybrid heterojunction solar cell utilizing low temperature and liquid phase-processed TiO2 as an interlayer between PEDOT:PSS and Si nanoholes to produce a conformal contact on the surface of the Si nanostructure. The hydrophilic TiO2/Si-nanohole surface enabling the PEDOT:PSS to flow into the spacing of the close-packed nanoholes. SEM images are use to confirm the PEDOT:PSS nanohole filling induced by the TiO2. With forming gas annealing of the double-sided TiO2, high Voc (0.63 V) and Jsc (35.7 mA/cm2) are obtained, yielding a high power conversion efficiency of 14.7%. The high Voc are attributed to the surface passivation of Si by annealed TiO2. The XPS investigation at the TiO2/Si interface indicates the TiOx signal decreased and the TiO2 and SiOx signals increased after annealing. The Si–O bonding found in the O1s study appeared in the form of Si–O–Si bonding to serve surface passivation. The band alignment of the PEDOT:PSS/TiO2/n-Si hetero-interfaces is postulated and plotted. The Vbi in the system after annealing was assumed to be higher because of the reduction of bulk and surface states that yield high Voc. After annealing, the Vbi increased from 0.805 to 0.905 V. The reduction of surface recombination velocity proved the passivation ability of TiO2 after annealing. With proven surface passivation and conformal PEDOT:PSS/Si nanohole interfaces for enhanced contact, this Si-organic hybrid heterojunction solar cell with solution-processed TiO2 interlayers has excellent potential for application as a high-efficiency and low-cost Si solar cell.
"Utilization of metal oxide cathode interfacial layer on donor/acceptor solar cells." Thesis, 2011. http://library.cuhk.edu.hk/record=b6075454.
Повний текст джерелаThesis (Ph.D.)--Chinese University of Hong Kong, 2011.
Includes bibliographical references.
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstract also in Chinese.
Bersch, Eric. "Energy level alignment in metal/oxide/semiconductor and organic dye/oxide systems." 2008. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17431.
Повний текст джерелаHan-QiShangguan and 上官翰琦. "Metal Oxide Electrode-Interlayer in Organolead Iodide Perovskite-Based Solar Cells." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/p6gky9.
Повний текст джерела國立成功大學
光電科學與工程學系
104
In the past five years, organometal halide perovskite were identified as promising absorbers for solar cells. Although the power conversion efficiencies of perovskite solar cells have rapidly risen to over 20%, there is much room for further improvenment in efficiencies and stability through development of novel materials. Here, we use matel oxide materials, NiOx and ZnO, to substitute PEDOT:PSS and C60 as the hole transport layer and electron transport layer in regular structure planar heterojunction perovskite solar cells. Replacing PEDOT:PSS with NiOx, the efficiencies of devices raised up to over 14%. Replacing C60 with ZnO which was deposited by thermal evaporator, the efficiencies of devices came to be 2.63%. After introducing C60 as a blocking layer, the efficiencies of devices raised up to over 4.55%. We deposited the ZnO films by sputtering and introduced the LiF as the blocking layer because sputtering ZnO film destroyed the perovskite films. We confirmed the blocking layer protected the perovskite layer.