10.3% Efficient CuIn(S,Se)2 Solar Cells from DMF Molecular Solution with the Absorber Selenized under High Argon Pressure
10.3% Efficient CuIn(S,Se)2 Solar Cells from DMF Molecular Solution with the Absorber Selenized under High Argon Pressure
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10.3%%20Efficient%20CuIn(S,Se)(2)%20Solar%20Cells%20from%20DMF%20分子%20Solution%20with%20the%20Absorber%20Selenized%20under%20High%20Argon%20Pressure
DOI：
10.1002/solr.201800044
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发表时间：
2018-06-01
期刊：
影响因子：
7.9
通讯作者：
Xin, Hao
中科院分区：
文献类型：
--
作者：
Jiang, Jingjing;Yu, Shaotang;Xin, Hao
利用环境友好的溶剂制备高性能的黄铜矿吸波材料对规模化生产具有重要意义。本文以N，N-二甲基甲酰胺(DMF)为单一溶剂，制备了CuIn(S，Se)(2)(CIS)分子前驱体溶液，制备了CIS吸波材料。在1.6个大气压的Ar气压下，薄膜的功率转换效率为10.3%，而在1个大气压下，薄膜的功率转换效率为0%。用X射线衍射仪、扫描电子显微镜、透射电子显微镜、能谱分析等手段对材料进行了表征，结果表明：1气氛下渗层为疏松连接的大颗粒大颗粒富铜吸收材料，底层为大孔洞的贫铜致密大颗粒顶层；进一步优化前驱体配方和器件制备条件，解决双层结构不完善的问题，有望进一步提高DMF溶液处理的独联体太阳电池的效率。结果表明，在大气压下退火前驱体薄膜是制备高性能薄膜太阳电池的一种新的、有前途的策略，可应用于包括CIS、CIGS和CZTS在内的所有溶液处理的硫系化合物太阳电池。
Fabricating high performing chalcopyrite absorber material from environmental benign solvent is very important for large scale manufacturing production. Here, N, N-dimethylformamide (DMF) is used as a single solvent to make CuIn(S,Se)(2) (CIS) molecular precursor solution and fabricate CIS absorber material. A power conversion efficiency of 10.3% has been achieved from film selenized under 1.6 atmosphere Ar pressure which is 0% for film selenized under 1 atmosphere pressure. Characterizations using XRD, SEM, TEM, EDX reveal a Cu-rich absorber material consisting of loosely connected grains with vertical holes in film selenized under 1 atmosphere and a Cu-poor compact large-grain top layer with large hole bottom layer in film selenized under high Ar pressure. Further optimization of precursor formulation and device fabrication conditions to address the non-perfect double layer structure is expected to further improve DMF solution processed CIS solar cell efficiency. Our results demonstrate annealing precursor film under increased atmosphere pressure is a new and promising strategy to fabricate high performing thin film solar cells, which can be applied to all solution processed chalcogenide solar cells including CIS, CIGS and CZTS.