Zhanwu Wang , Meiling Ma , Hongduo Wu , Yingrui Sui
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引用次数: 0
Abstract
Selenium-rich Cu2ZnSn(S,Se)4 (CZTSSe) absorber with large-grained structure is a significant contribution to the preparation of efficient CZTSSe solar cells. Therefore, it is important to find an applicable method to adjust the S/(S + Se) ratio in CZTSSe films. Here, the influence of annealing temperature and time on the regulation of S/(S + Se) ratio in the absorption layer was studied based on the preparation of Co-doped CZTSSe films by sol–gel method. The results show that the ratio of S/(S + Se) in Co-doped CZTSSe films decreases with increasing annealing temperature and time. Adjusting the S/(S + Se) ratio can significantly improve the surface morphology of the Co-doped CZTSSe absorber and passivate the grain boundary defects. Co-doped CZTSSe films have the best surface morphology under the optimal annealing conditions of 560 °C for 15 min, which significantly inhibits CuZn antisite defects and [2CuZn + SnZn] defect clusters. At last, the Co-doped CZTSSe solar cells with the highest efficiency of 7.46 % were obtained under the optimum annealing condition. The optimal filling factor reaches 62.10 %, which is at the high level of the reported kesterite solar cells.
Results in PhysicsMATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY
CiteScore
8.70
自引率
9.40%
发文量
754
审稿时长
50 days
期刊介绍:
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