Cu2ZnSnS4 photovoltaic cell with improved efficiency fabricated by high-temperature annealing after CdS buffer-layer deposition

被引:102
作者
Tajima, Shin [1 ]
Umehara, Mitsutaro [1 ]
Hasegawa, Masaki [1 ]
Mise, Takahiro [1 ]
Itoh, Tadayoshi [1 ]
机构
[1] Toyota Cent Res & Dev Labs Inc, 41-1 Yokomichi, Nagakute, Aichi 4801192, Japan
来源
PROGRESS IN PHOTOVOLTAICS | 2017年 / 25卷 / 01期
关键词
CZTS; CdS; post-annealing; photovoltaics; thin films; FILM SOLAR-CELLS; CONDUCTION-BAND OFFSET; PERFORMANCE;
D O I
10.1002/pip.2837
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
To improve the photovoltaic properties of Cu2ZnSnS4 (CZTS) cells, we investigated the effect of both the thickness of the deposited CdS layers and the post-annealing temperature following CdS deposition on the photovoltaic properties of CZTS cells using a two-layer CZTS structure. By depositing a thin CdS layer (40nm) followed by high temperature annealing (603K), we observed a remarkable increase in the short-circuit current density because of the enhancement of the external quantum efficiency in the wavelength range of 400-800nm. The best CZTS cell exhibited a conversion efficiency of 9.4% in the active area (9.1% in the designated area). In addition, we also fabricated a CZTS cell with open-circuit voltage of 0.80V by appropriately tuning the composition of the CZTS layers. Copyright (c) 2016 John Wiley & Sons, Ltd.
引用
收藏
页码:14 / 22
页数:9
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