Cu2ZnSnS4 thin film solar cells with 5.8% conversion efficiency obtained by a facile spray pyrolysis technique

被引：53
作者：
Nguyen, Thi Hiep [1 ]
Septina, Wilman [1 ]
Fujikawa, Shotaro [1 ]
Jiang, Feng [1 ]
Harada, Takashi [1 ]
Ikeda, Shigeru [1 ]
机构：
[1] Osaka Univ, Res Ctr Solar Energy Chem, Toyonaka, Osaka 5608531, Japan
来源：
RSC ADVANCES | 2015年 / 5卷 / 95期
关键词：
5.1-PERCENT EFFICIENCY; OPTICAL-PROPERTIES; DEPOSITION; FABRICATION;
D O I：
10.1039/c5ra13000j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
An attempt was made to fabricate Cu2ZnSnS4 (CZTS) thin film absorber on a Mo-coated glass substrate by using facile spray pyrolysis deposition of a precursor film from an aqueous solution containing Cu(NO3)(2), Zn(NO3)(2), Sn(CH3SO3)(2) and thiourea. In order to obtain a stable solution for the spray pyrolysis deposition without formation of an SnO2 precipitate, the mixing order of source materials was found to be important. Annealing of the thus-obtained precursor film in sulfur vapor at temperatures ranging from 580 degrees C to 600 degrees C resulted in successful formation of homogeneous films composed of CZTS crystallites. Based on structural analyses of CZTS films having different Sn contents, an Sn-rich composition compared to its stoichiometric amount was found to be essential for efficient grain growth of the resulting CZTS films. A solar cell based on the Sn-rich CZTS film obtained by an optimum annealing condition exhibited maximum conversion efficiency of 5.8%.
引用
收藏
页码：77565 / 77571
页数：7
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