Efficient (Cu1-xAgx)2ZnSn(S,Se)4 solar cells on flexible Mo foils

被引：25

作者：

Yu, Xue ^{[1
]}

Cheng, Shuying ^{[1
,2
]}

Yan, Qiong ^{[1
]}

Yu, Jinling ^{[1
,2
]}

Qiu, Wen ^{[1
]}

Zhou, Zhengji ^{[3
]}

Zheng, Qiao ^{[1
,2
]}

Wu, Sixin ^{[3
]}

机构：

[1] Fuzhou Univ, Inst Micronano Devices & Solar Cells, Coll Phys & Informat Engn, Fuzhou 350108, Fujian, Peoples R China

[2] Jiangsu Collaborat Innovat Ctr Photovolat Sci & E, Changzhou 213164, Peoples R China

[3] Henan Univ, Collaborat Innovat Ctr Nano Funct Mat & Applicat, Key Lab Special Funct Mat MOE, Kaifeng 475004, Henan, Peoples R China

来源：

RSC ADVANCES | 2018年 / 8卷 / 49期

基金：

中国国家自然科学基金;

关键词：

EARTH-ABUNDANT; FILM; CU2ZNSNS4; DEFECTS; DEVICE; PRECURSOR; GROWTH; LAYER; CU;

D O I：

10.1039/c8ra04958k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cation substitution plays a crucial role in improving the efficiency of Cu2ZnSn(S,Se)(4) (CZTSSe) solar cells. In this work, we report a significant efficiency enhancement of flexible CZTSSe solar cells on Mo foils by partial substitution of Cu+ with Ag+. It is found that the band gap (E-g) of (Cu1-xAgx)(2)ZnSn(S,Se)(4) (CAZTSSe) thin films can be adjusted by doping with Ag with x from 0 to 6%, and the minimum E-g is achieved with x = 5%. We also found that Ag doping can obviously increase the average grain size of the CAZTSSe absorber from 0.4 to 1.1 mm. Additionally, the depletion width (W-d) at the heterojunction interface of CAZTSSe/CdS is found to be improved. As a result, the open-circuit voltage deficit (V-oc,V-def) is gradually decreased, and the band tailing is suppressed. Benefiting from the enhanced open-circuit voltage (V-oc), the power conversion efficiency (PCE) is successfully enhanced from 4.34% (x = 0) to 6.24% (x = 4%), and the V-oc, def decreases from 915 to 848 mV.

引用

页码：27686 / 27694

页数：9

共 31 条

[1] Characterization of defects in 9.7% efficient Cu2ZnSnSe4-CdS-ZnO solar cells [J].