Impact of sequential annealing step on the performance of Cu2ZnSn(S,Se)4 thin film solar cells

被引：5

作者：

Li, Chunran ^{[1
,2
,3
,4
]}

Yao, Bin ^{[1
,2
,3
]}

Li, Yongfeng ^{[2
,3
]}

Ding, Zhanhui ^{[2
,3
]}

Zhao, Haifeng ^{[5
]}

Zhang, Ligong ^{[5
]}

Zhang, Zhenzhong ^{[5
]}

机构：

[1] Jilin Univ, Coll Phys, Minist Educ, Key Lab Phys & Technol Adv Batteries, Changchun 130012, Peoples R China

[2] Jilin Univ, State Key Lab Superhard Mat, Changchun 130023, Peoples R China

[3] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

[4] Bohai Univ, Coll Math & Phys, Jinzhou 121013, Peoples R China

[5] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, 3888 Dongnanhu Rd, Changchun 130033, Peoples R China

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2016年 / 95卷

基金：

中国国家自然科学基金;

关键词：

Cu2ZnSn(S; Se)(4); Sequential annealing; Thin film solar cell; Selenium gradient; Device modeling; THEORETICAL-ANALYSIS; DYE; EFFICIENCY; FABRICATION; CU2ZNSNS4; LAYERS; TIO2;

D O I：

10.1016/j.spmi.2016.04.025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this study, we investigated influence of sequential heat treatment on the structural, morphological and optical properties of Cu2ZnSn(S,Se)(4) (CZTSSe) thin films. Specifically, after preparation of sputtered Cu, ZnS, and Sn stacked layers, CZTSSe thin films were synthesized by sequential heat treatment (sulfurization follow by selenization). Analyses of the processed films show that non-uniform selenium distribution through the depth of the films can be obtained by introducing a controlled amount of selenium in the second heat treatment step. The top region of the film becomes selenium rich, while the bottom region is selenium poor. This structure has higher absorption coefficients than the uniform ones. In addition, the uneven composition distribution may lead to a bandgap gradient in the film, which can reduce the photocurrent loss. Finally, numerical modeling corroborates the potential of selenium gradient films for high efficiency CZTSSe solar cells. (C) 2016 Published by Elsevier Ltd.

引用

页码：149 / 158

页数：10

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