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Insight into band alignment of Zn(O,S)/CZTSe solar cell by simulation
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作者 Zhen-Wu Jiang shou-shuai gao +7 位作者 Si-Yu Wang Dong-Xiao Wang Peng gao Qiang Sun Zhi-Qiang Zhou Wei Liu Yun Sun Yi Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第4期408-414,共7页
Cd-free kesterite structured solar cells are currently attracting attention because they are environmentally friendly. It is reported that Zn(O,S) can be used as a buffer layer in these solar cells. However, the band ... Cd-free kesterite structured solar cells are currently attracting attention because they are environmentally friendly. It is reported that Zn(O,S) can be used as a buffer layer in these solar cells. However, the band alignment is not clear and the carrier concentration of Zn(O,S) layer is low. In this study, the band alignment of the Zn(O,S)/Cu_2 ZnSnSe_4 p–n junction solar cell and the effect of In_2 S_3/Zn(O,S) double buffer layer are studied by numerically simulation with wxAMPS software.By optimizing the band gap structure between Zn(O,S) buffer layer and Cu_2 ZnSnSe_4 absorber layer and enhancing the carrier concentration of Zn(O,S) layer, the device efficiency can be improved greatly. The value of CBO is in a range of 0 eV–0.4 eV for S/(S + O)= 0.6–0.8 in Zn(O,S). The In_2 S_3 is mainly used to increase the carrier concentration when it is used as a buffer layer together with Zn(O,S). 展开更多
关键词 CZTSe BAND ALIGNMENT double BUFFER layer SIMULATION
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