1. A facile one-step chemical synthesis of copper@reduced graphene oxide composites as back contact for CdTe solar cells.
- Author
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Luo, Guangcan, Zhu, Linyu, Tan, Bo, Wang, Taowen, Bi, Xue, Li, Wei, Zhang, Jingquan, Hao, Xia, Wang, Wenwu, and Zhang, Ziling
- Subjects
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SOLAR cells , *GRAPHENE oxide , *CHEMICAL synthesis , *GRAPHENE synthesis , *OPEN-circuit voltage - Abstract
• A facile one-step chemical method was used for the synthesis of Cu@rGO composites. • A Cu@rGO/Au system as a back contact layer was developed for the CdTe solar cells. • rGO improves the hole collection ability, and supplies an active Cu diffusion source. • Significantly enhanced performance (e.g., E ff > 16%,Voc > 830 mV; FF > 73%) was achieved for CdTe solar cells. The copper/reduced graphene oxide (Cu@rGO) composites have been synthesized via a novel and facile chemical method and been characterized by a series of measuring techniques. Then the Cu@rGO as a primary back contact has been coated on the absorber in the CdTe solar cells. After optimizing the Cu@rGO back contact processing, significantly enhanced performance especially in efficiency, open-circuit voltage and fill factor has been achieved for CdTe solar cells. The Cu@rGO supplies an effective Cu diffusion source after annealing which achieves a considerable hole concentration, and the rGO is converted into p-type conducting with Au metallization, resulting in the decrease of the back barrier and improvement of the hole collection ability. The cells with Cu@rGO/Au exhibit more outstanding photovoltaic performance than those with Cu/Au or rGO/Au back contact. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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