Thin film solar cell with 8.4% power conversion efficiency using an earth-abundant Cu2ZnSnS4 absorber

被引：1030

作者：

Shin, Byungha ^{[1
]}

Gunawan, Oki ^{[1
]}

Zhu, Yu ^{[1
]}

Bojarczuk, Nestor A. ^{[1
]}

Chey, S. Jay ^{[1
]}

Guha, Supratik ^{[1
]}

机构：

[1] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA

来源：

PROGRESS IN PHOTOVOLTAICS | 2013年 / 21卷 / 01期

关键词：

Cu2ZnSnS4; earth-abundant absorber; co-evaporation; photoluminescence; PHOTOVOLTAICS;

D O I：

10.1002/pip.1174

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：

Using vacuum process, we fabricated Cu2ZnSnS4 solar cells with 8.4% efficiency, a number independently certified by an external, accredited laboratory. This is the highest efficiency reported for pure sulfide Cu2ZnSnS4 prepared by any method. Consistent with literature, the optimal composition is Cu-poor and Zn-rich despite the precipitation of secondary phases (e.g., ZnS). Despite a very thin absorber thickness (similar to 600 nm), a reasonably good short-circuit current was obtained. Time-resolved photoluminescence measurements suggest a minority carrier-diffusion length on the order of several hundreds of nanometers and relatively good collection of photo-carriers across the entire absorber thickness. Copyright (C) 2011 John Wiley & Sons, Ltd.

引用

页码：72 / 76

页数：5

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