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Flexible kesterite Cu2ZnSnS4 solar cells with sodium-doped molybdenum back contacts on stainless steel substrates

Authors :
Sun, Kaiwen
Liu, Fangyang
Huang, Jialiang
Yan, Chang
Song, Ning
Sun, Heng
Xue, Chaowei
Zhang, Yuanfang
Pu, Aobo
Shen, Yansong
Stride, John A.
Green, Martin
Hao, Xiaojing
Sun, Kaiwen
Liu, Fangyang
Huang, Jialiang
Yan, Chang
Song, Ning
Sun, Heng
Xue, Chaowei
Zhang, Yuanfang
Pu, Aobo
Shen, Yansong
Stride, John A.
Green, Martin
Hao, Xiaojing
Publication Year :
2018

Abstract

In this work we report the Na incorporation from Na-doped Mo (Mo-Na) back contact for kesterite Cu2ZnSnS4 solar cells on flexible stainless steel substrates. It is demonstrated that Na can be effectively incorporated into CZTS by inserting Mo-Na layer at back contact. Direct contact of CZTS and Mo-Na layer leads to poor homogeneity and adhesion. The thickness of MoS2 formed at the back contact depends on the presence of Na and whether Mo contacts with CZTS directly. Back contact configuration with a Mo capping layer on Mo-Na layer is found to be helpful to maintain the advantages of Mo back contact and control the thickness of MoS2 interface. As a result, CZTS device fabricated on this configuration yields higher conversion efficiency of 6.2%. However, this efficiency is still far lower than that on traditional soda lime glass substrate which shows efficiency over 8%. The loss mechanism of device fabricated on stainless steel is investigated and analyzed according to the device performance and electrical parameters.

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1363081632
Document Type :
Electronic Resource