Influence of ZnS Sputtering Power on Cu2ZnSnS4 Thin Film Adhesion andPerformance of Solar Cells
WANG Lu1, GUO Jie1, HAO Ruiting2, Gu Kang2, LIU Bin1, WANG Yuanfangzhou1, SUN Shuaihui1
1 Yunnan Key Laboratory of Optoelectronic Information Technology, Yunnan Normal University, Kunming 650500; 2 Key Laboratory of Renewable Energy Advanced Materials and Manufacturing Technology Ministry of Education, School of Energy and Environment Sciences, Yunnan Normal University, Kunming 650500
Abstract: The stacking precursors SLG/Mo/ZnS/SnS/Cu were sputtered ZnS, SnS and Cu target in sequence on soda-lime glass (SLG) substrates in which the sputtering power of ZnS changed from 50 W to 140 W. Then Cu2ZnSnS4 (CZTS) thin films were obtained by annealing. The effects of ZnS sputtering powers on the morphology, microstructure and adhesion in ZnS thin films and followed CZTS thin films were investigated. The results showed that the ZnS thin films with different power sputtering were hexagonal wurtzite with (008) preferred orientation. The poor crystallization in ZnS thin film was found at low sputtering power. The compressive stress in ZnS thin film increased by an order of magnitude with sputtering power from 50 W to 140 W. When sputtering power of ZnS was lower than 80 W or higher than 110 W, the crack and even falling off phenomenon were observed in the annealed CZTS thin films. From 80 W to 110 W, the surface of CZTS thin film was even but more holes and se-condary phases appeared at higher power of 110 W. The CZTS solar cell was prepared with ZnS thin films sputtered at 80 W, which showed open circuit voltage of 572 mV, short circuit current density of 14.23 mA/cm2 and photoelectric conversion efficiency of 3.34%.
王璐, 郭杰, 郝瑞亭, 顾康, 刘斌, 王远方舟, 孙帅辉. ZnS溅射功率对Cu2ZnSnS4薄膜附着性及太阳电池性能的影响[J]. 材料导报, 2019, 33(Z2): 24-27.
WANG Lu, GUO Jie, HAO Ruiting, Gu Kang, LIU Bin, WANG Yuanfangzhou, SUN Shuaihui. Influence of ZnS Sputtering Power on Cu2ZnSnS4 Thin Film Adhesion andPerformance of Solar Cells. Materials Reports, 2019, 33(Z2): 24-27.
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