Carbon-free Cu_2ZnSn(S,Se)_4 film prepared via a non-hydrazine route  

作　　者：ZOU YuGang LIU Jie ZHANG Xing JIANG Yan HU JinSong WAN Li-Jun 

机构地区：[1]Beijing National Laboratory for Molecular Sciences [2]CAS Key Laboratory of Molecular Nanostructure and Nanotechnology [3]Institute of Chemistry, Chinese Academy of Sciences

出　　处：《Science China Chemistry》2014年第11期1552-1558,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(21173237,91127044,21121063);the National Basic Research Program of China(2011CB808700,2012CB932900);the Chinese Academy of Sciences

摘　　要：The kesterite Cu2ZnSn(S,Se)4(CZTSSe) is an ideal candidate for light harvesting materials in earth-abundant low-cost thinfilm solar cells(TFSC). Although the solution-based processing is a most promising approach to achieve low-cost solar cells with high power conversion efficiency, the issues of poor crystallinity and carbon residue in CZTSSe thin films are still challenging. Herein, a non-hydrazine solution-based method was reported to fabricate highly crystallized and carbon-free kesterite CZTSSe thin films. Interestingly, it was found that the synthetic atmosphere of metal organic precursors have a dramatic impact on the morphology and crystallinity of CZTSSe films. By optimizing the processing parameters, we were able to obtain a kesterite CZTSSe film composed of compact large crystal grains with trace carbon residues. Also, a viable reactive ion etching(RIE) processing with optimized etching conditions was then developed to successfully eliminate trace carbon residues on the surface of the CZTSSe film.The kesterite Cu2ZnSn（S,Se）4（CZTSSe） is an ideal candidate for light harvesting materials in earth-abundant low-cost thinfilm solar cells（TFSC）. Although the solution-based processing is a most promising approach to achieve low-cost solar cells with high power conversion efficiency, the issues of poor crystallinity and carbon residue in CZTSSe thin films are still challenging. Herein, a non-hydrazine solution-based method was reported to fabricate highly crystallized and carbon-free kesterite CZTSSe thin films. Interestingly, it was found that the synthetic atmosphere of metal organic precursors have a dramatic impact on the morphology and crystallinity of CZTSSe films. By optimizing the processing parameters, we were able to obtain a kesterite CZTSSe film composed of compact large crystal grains with trace carbon residues. Also, a viable reactive ion etching（RIE） processing with optimized etching conditions was then developed to successfully eliminate trace carbon residues on the surface of the CZTSSe film.

关 键 词：CZTS CZTSSe solar cells carbon non-hydrazine 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ131.21[化学工程—无机化工]