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Light trapping em células solares de filme fino
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| 1.7 MB | Adobe PDF |
Advisor(s)
Abstract(s)
RESUMO: As células solares de Cu(In,Ga)Se2 (CIGS) têm vindo a receber uma atenção especial por parte da comunidade científica e industrial, resultante maioritariamente das suas excelentes propriedades optoeletrónicas que permitem a esta tecnologia atingir um valor recorde de eficiência de 23.35%. No entanto, este material (CIGS) é composto por elementos escassos e dispendiosos (In e Ga). Deste modo, são necessárias estratégias para otimizar a utilização destes elementos. A diminuição da espessura da camada absorvente permite a implementação desta tecnologia em larga-escala mitigando o problema referido anteriormente. No entanto, a eficiência da absorção da luz é afetada, à medida que a espessura do material absorvente diminui. Neste trabalho, é apresentada uma arquitetura nova que recorre a nanoestruturas no contacto posterior do dispositivo, que permitem aumentar o percurso ótico na camada de CIGS, aumentando a probabilidade da luz ser absorvida na mesma.
ABSTRACT: The Cu(In,Ga)Se2 (CIGS) solar cells have been receiving special attention from the scientific and industrial community, mostly resulting from their excellent optoelectronic properties, allowing this technology to reach record efficiency values (23.35%). However, this material (CIGS) consists of scarce and expensive elements (In and Ga). Thus, strategies are needed to optimize the use of these elements. Decreasing the thickness of the absorber layer allows for the use of this technology on a large scale, overcoming the previous issue. However, the light absorption’s efficiency is affected, as the thickness of the absorber material decreases. In this work, a new architecture that uses nanostructures in the rear contact of the device is presented, these allow for an increase on the optical path in the CIGS layer, increasing the probability of light absorption.
ABSTRACT: The Cu(In,Ga)Se2 (CIGS) solar cells have been receiving special attention from the scientific and industrial community, mostly resulting from their excellent optoelectronic properties, allowing this technology to reach record efficiency values (23.35%). However, this material (CIGS) consists of scarce and expensive elements (In and Ga). Thus, strategies are needed to optimize the use of these elements. Decreasing the thickness of the absorber layer allows for the use of this technology on a large scale, overcoming the previous issue. However, the light absorption’s efficiency is affected, as the thickness of the absorber material decreases. In this work, a new architecture that uses nanostructures in the rear contact of the device is presented, these allow for an increase on the optical path in the CIGS layer, increasing the probability of light absorption.
Description
CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar
Keywords
Solar energy Solar cells Nanostructures
Citation
Oliveira, K... [et.al.] - Light trapping em células solares de filme fino. In: CIES2020: As Energias Renováveis na Transição Energética: Livro de Comunicações do XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar. Helder Gonçalves, Manuel Romero (Ed.). Lisboa, Portugal: LNEG, 3-5 Novembro, 2020, p. 315-321
Publisher
LNEG - Laboratório Nacional de Energia e Geologia