Materia | |
Theoretical study of c-GaN/GaAs single heterojunction solar cells | |
López, Máximo López1  Puente, Gerardo Contreras2  RodrÃguez, Guillermo Santana3  Peredo, Luis Zamora4  Torres, Julián Hernández4  Cruz, Ana Gabriela Galicia4  González, Leandro GarcÃa4  SolÃs, Mario DÃaz4  | |
[1] Centro de Investigación y de Estudios Avanzados del IPN, México City, Mexico;Escuela Superior de FÃsica y Matemáticas del IPN, México City, Mexico;Universidad Nacional Autónoma de México, México City, Mexico;Universidad Veracruzana, Boca del RÃo, Mexico | |
关键词: GaN/GaAs; heterostructures; TCAD modeling; I-V curves; solar cell.; | |
DOI : 10.1590/s1517-707620170004.0221 | |
学科分类:工程和技术(综合) | |
来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia | |
【 摘 要 】
In this work a theoretical study of electrical behavior for a c-GaN/GaAs heterostructure as a photovoltaic device through a two-dimensional (2D) finite element numerical simulation is presented for a first time. I-V curves and electrical parameters like short circuit current (Isc), open circuit voltage (Voc), fill factor (FF) and efficiency (η) were obtained for n-i-p and n-p heterostructures with different thicknesses and doping of the layers by modeling heterostructures with characteristics parameters of this materials previously reported. As a result, an increment on Isc was observed by extending the thickness of i-GaAs layer from 12 mA/cm2 for thinner heterostructures to a maximum of ~32 mA/cm2 for heterostructures with i-GaAs layer >3000 nm and a decrease in Voc and FF in the range from ~1.06 V and 0.89 for n-p heterostructures to 0.75 V and 0.7 respectively for thicker i-GaAs layers allowing estimate maximum efficiencies between 23 and 25% for n-i-p and n-p configurations, respectively. This study allows demonstrating the potential of this type of heterostructures for solar cells applications, considering the possibility of using p-doping GaAs substrates for photovoltaics based in GaN.
【 授权许可】
CC BY
【 预 览 】
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RO201904286371527ZK.pdf | 930KB | download |