Improved performance in Cu2ZnSnSe4 solar cells using a sandwich structured ZnSe/Cu2SnSe3/ZnSe precursor

被引：5
作者：
Kim, Kang Min [1 ,2 ]
Tampo, Hitoshi [1 ]
Kim, Shinho [1 ]
Shibata, Hajime [1 ]
Niki, Shigeru [1 ]
Han, HyukSu [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan
[2] Korea Inst Ind Technol, Gwahakdanji Ro 137-41, Kangnung 25440, Gangwond Do, South Korea
来源：
CURRENT APPLIED PHYSICS | 2017年 / 17卷 / 03期
基金：
日本科学技术振兴机构;
关键词：
Solar cell; Thin film; Cu2ZnSnSe4;
D O I：
10.1016/j.cap.2016.12.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cu2ZnSnSe4 (CZTSe) films with different Zn/Sn ratios were fabricated using Cu2SnSe3 (CTSe) and ZnSe bilayer precursors (ZnSe/CTSe/Mo) and sandwich-structured precursors (ZnSe/CTSe/ZnSe/Mo). Using the bilayer precursor, excessive ZnSe on top of the CZTSe films with a Zn/Sn ratio of 1.3 that acts as a current blocking barrier was observed, reducing the short-circuit current density of the CZTSe solar cells. Modification of the precursor structure from the bilayer to the sandwiched structure eliminates the segregation of ZnSe phase on top of the film even for a high (1.25) Zn/Sn ratio. This modification improved the cell efficiency from 6% (bilayer precursor) to 9% (sandwich-structured precursor). (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：366 / 369
页数：4
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