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arXiv · 1905.03432

More than 3-mm-long carrier diffusion and strong absorption over the full solar spectrum in copper oxide and selenium composite film

Fei Gao·Rongrong Gao·Hao Liu·Zhou Yang·Xiaodong Hua·Xin Wu·Shengzhong·Liu
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Abstract

Usually, single-crystal material has a longer carrier diffusion length due to fewer defects. Here, we report a nano/amorphous copper oxide and selenium (COS) composite film prepared by radio frequency magnetron co-sputtering of CuO and Se and post annealing. The photo-generated carriers in the COS film can diffuse very far (3.147 mm). Additionally, the COS film can strongly absorb light over the entire solar spectrum region (250-2500 nm) (average absorptance is ~80%). These results indicate that the COS composite is an excellent material and can be used in solar cells and other photo-electric devices.

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Fei Gao, Rongrong Gao, Hao Liu, Zhou Yang, Xiaodong Hua, Xin Wu, Shengzhong, Liu. 2019-05-09. More than 3-mm-long carrier diffusion and strong absorption over the full solar spectrum in copper oxide and selenium composite film. https://arxiv.org/abs/1905.03432

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