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High-Efficient Solar Cells Textured by Cu/Ag-Cocatalyzed Chemical Etching on Diamond Wire Sawing Multicrystalline Silicon

Author:
Chen, Wei, Liu, Yaoping, Wu, Juntao, Chen, Quansheng, Zhao, Yan, Wang, Yan, Du, Xiaolong
Source:
ACS applied materials & interfaces 2019 v.11 no.10 pp. 10052-10058
ISSN:
1944-8252
Subject:
materials science, sawing, silicon, solar cells, solar farms, texture
Abstract:
We reported a novel texture method through one-step Cu/Ag-cocatalyzed chemical etching which can be widely used in the photovoltaic industry because of its simple and low-cost process. The etching mechanism of an inverted rectangular pyramid is the cooperation of Ag-catalyzed vertical etching and Cu-catalyzed lateral etching. In our texture method, neither saw damage removal nor post-treatment is needed. During the etching process, the digging holes by Ag-catalyzed etching and enlarging holes by Cu-catalyzed etching completed at the same step. Benefiting from the excellent light-trapping and passivation effect of the inverted rectangular pyramid, diamond wire sawing multicrystalline silicon (mc-Si) Al-BSF solar cells with a super high efficiency of 19.49% had been obtained.
Agid:
6323745