Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/53147 |
Resumo: | Thin film, CIGS solar cells were able to achieve efficiency values higher than multicristalline silicon solar cells (22.9 % vs 22.3 %). However, a possible In scarcity, may increase its production costs, hence decreasing the CIGS thickness is of upmost importance for the technology to stay cost-competitive. However, when decreasing the CIGS thickness two main efficiency limitations arise; rear contact recombination and optical losses due to incomplete light absorption. The main focus of this thesis is to increase the rear optical reflection of an ultrathin CIGS solar cell. For that, six different metals (Ag, Au, Cu, Ta, Ti and Zn) and two metallic alloys (AlSiCu and TiW) were tested as possible candidates for increasing the rear optical reflection and a nanopattern point structure was employed with Al2O3 as the passivation layer. Optical simulations were conducted to verify which metals gives the highest enhancement at increasing the light absorption in the CIGS layer. The solar cells fabricated were heavily affected by the reaction of the metal layer with the CIGS. As such, an alternative solar cell architecture was developed to prevent such reaction by depositing a Mo layer to cover the point contacts. In the end, the solar cell that incorporate a TiW layer, managed to achieve a 3.69 % (absolute) enhancement in efficiency values over the reference solar cell. |
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Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cellsCIGSmetallic layerrear reflectionoptical simulationTiWDomínio/Área Científica::Engenharia e Tecnologia::Engenharia dos MateriaisThin film, CIGS solar cells were able to achieve efficiency values higher than multicristalline silicon solar cells (22.9 % vs 22.3 %). However, a possible In scarcity, may increase its production costs, hence decreasing the CIGS thickness is of upmost importance for the technology to stay cost-competitive. However, when decreasing the CIGS thickness two main efficiency limitations arise; rear contact recombination and optical losses due to incomplete light absorption. The main focus of this thesis is to increase the rear optical reflection of an ultrathin CIGS solar cell. For that, six different metals (Ag, Au, Cu, Ta, Ti and Zn) and two metallic alloys (AlSiCu and TiW) were tested as possible candidates for increasing the rear optical reflection and a nanopattern point structure was employed with Al2O3 as the passivation layer. Optical simulations were conducted to verify which metals gives the highest enhancement at increasing the light absorption in the CIGS layer. The solar cells fabricated were heavily affected by the reaction of the metal layer with the CIGS. As such, an alternative solar cell architecture was developed to prevent such reaction by depositing a Mo layer to cover the point contacts. In the end, the solar cell that incorporate a TiW layer, managed to achieve a 3.69 % (absolute) enhancement in efficiency values over the reference solar cell.Salomé, PedroMendes, ManuelRUNLopes, Tomás Sousa2018-11-29T15:43:55Z2018-1020182018-10-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/53147enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:25:38Zoai:run.unl.pt:10362/53147Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:32:25.542274Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
title |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
spellingShingle |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells Lopes, Tomás Sousa CIGS metallic layer rear reflection optical simulation TiW Domínio/Área Científica::Engenharia e Tecnologia::Engenharia dos Materiais |
title_short |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
title_full |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
title_fullStr |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
title_full_unstemmed |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
title_sort |
Metal layer for enhanceng optical reflection in passivation layers in thin-film solar cells |
author |
Lopes, Tomás Sousa |
author_facet |
Lopes, Tomás Sousa |
author_role |
author |
dc.contributor.none.fl_str_mv |
Salomé, Pedro Mendes, Manuel RUN |
dc.contributor.author.fl_str_mv |
Lopes, Tomás Sousa |
dc.subject.por.fl_str_mv |
CIGS metallic layer rear reflection optical simulation TiW Domínio/Área Científica::Engenharia e Tecnologia::Engenharia dos Materiais |
topic |
CIGS metallic layer rear reflection optical simulation TiW Domínio/Área Científica::Engenharia e Tecnologia::Engenharia dos Materiais |
description |
Thin film, CIGS solar cells were able to achieve efficiency values higher than multicristalline silicon solar cells (22.9 % vs 22.3 %). However, a possible In scarcity, may increase its production costs, hence decreasing the CIGS thickness is of upmost importance for the technology to stay cost-competitive. However, when decreasing the CIGS thickness two main efficiency limitations arise; rear contact recombination and optical losses due to incomplete light absorption. The main focus of this thesis is to increase the rear optical reflection of an ultrathin CIGS solar cell. For that, six different metals (Ag, Au, Cu, Ta, Ti and Zn) and two metallic alloys (AlSiCu and TiW) were tested as possible candidates for increasing the rear optical reflection and a nanopattern point structure was employed with Al2O3 as the passivation layer. Optical simulations were conducted to verify which metals gives the highest enhancement at increasing the light absorption in the CIGS layer. The solar cells fabricated were heavily affected by the reaction of the metal layer with the CIGS. As such, an alternative solar cell architecture was developed to prevent such reaction by depositing a Mo layer to cover the point contacts. In the end, the solar cell that incorporate a TiW layer, managed to achieve a 3.69 % (absolute) enhancement in efficiency values over the reference solar cell. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-29T15:43:55Z 2018-10 2018 2018-10-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/53147 |
url |
http://hdl.handle.net/10362/53147 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137946383679488 |