Reactive close-spaced sublimation processed CuSbSe2 thin films and their photovoltaic application
Chong Wang,
Bo Yang,
Ruiqing Ding,
Wenhao Chen,
Rokas Kondrotas,
Yang Zhao,
Shuaicheng Lu,
Zha Li,
Jiang Tang
Affiliations
Chong Wang
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Bo Yang
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Ruiqing Ding
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Wenhao Chen
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Rokas Kondrotas
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Yang Zhao
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Shuaicheng Lu
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Zha Li
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
Jiang Tang
Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, People’s Republic of China
CuSbSe2 is a promising absorber material for thin film solar cells because of its chemistry similarity to the well-known CuInSe2 but with low-cost and earth abundant component. Various methods have been employed to fabricate CuSbSe2 thin films with the best photovoltaic device achieving nearly 5% efficiency. Here, we develop a reactive close-spaced sublimation method to prepare high quality CuSbSe2 films via one evaporation process. In this method, a Cu layer is pre-sputtered onto the substrate, then reacts with Sb2Se3 vapor and its decomposition product Se, and finally generates single-phased CuSbSe2 films with large grains and proper doping density. This new strategy not only suppresses the decomposition of ternary chalcogenide CuSbSe2 but also is simple and applicable to other ternary semiconductors. Finally, based on this method, we have built prototype solar cells with a structure of AZO/CuSbSe2/CdS/i-ZnO/ZnO:Al/Au and obtained 3.04% power conversion efficiency for the champion device.
