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Atomic periodic engineering enabled ultrathin high-efficiency AgBiS2 solar cells
Xue Liu1, Hongbin Xiao1, Zhigang Zang1
1Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China. xiaohongbin@cqu.edu.cn.
Abstract:
The ultrahigh optical absorption coefficient of AgBiS2 has been achieved by atomic periodic engineering of AgS6 and BiS6 octahedrons. Furthermore, strong dielectric constant modulation and direct band gap of tetra-I41/amd AgBiS2 are obtained, which enable a high spectroscopic limited maximum efficiency of 29.7% at an ultrathin thickness of 100 nm.

