Influence of selenization atmosphere on the Cu2ZnSn(S,Se)4 thin films and its correlation to the performance of solar cells
Influence of selenization atmosphere on the Cu2ZnSn(S,Se)4 thin films and its correlation to the performance of solar cells
复制标题
硒化气氛对Cu2ZnSn(S,Se)4薄膜的影响及其与太阳能电池性能的相关性
DOI：
10.1016/j.materresbull.2017.05.053
复制
发表时间：
2017-10-01
影响因子：
5.4
通讯作者：
Zhuang, Bin
中科院分区：
文献类型：
--
作者：
Chen, Guilin;Wang, Weihuang;Zhuang, Bin
Selenization is a key process to prepare Cu2ZnSnSxSe4-x(CZTSSe) thin films from sulfide for high efficient solar cell. To explore the effect of annealing atmosphere on the substitution of S by Se in Cu2ZnSnS4 (CZTS) thin films, different selenization atmosphere (Vacuum or Ar) are used. By examining the annealed sample, it is found that selenization under Ar atmosphere replaces S with Se more efficiently, resulting large grain and small band-gap. The reaction kinetics has been studied to explore such phenomena. It demonstrates that the substitution reaction is enhanced when the flowing Ar carries off S gas. Finally, the effect of annealing atmosphere on oxide-based CZTSSe devices has also been studied. The Vacuum selenized CZTSSe device shows a higher efficiency of 4.4%, due to the more appropriate band-gap. To the best of our knowledge, this is the best device performance in oxides nanoparticles-derived CZTSSe solar cell. (C) 2017 Elsevier Ltd. All rights reserved.
