期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 3, 页码 3959-3968出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c19373
关键词
kesterite; Ag substitution; material engineering; thin film solar cells; V-oc-deficit characteristic
资金
- Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea Government Ministry of Trade, Industry and Energy [20194030202470]
- Technology Development Program to Solve Climate Changes of the National Research Foundation - Ministry of Science and ICT [2016M1A2A2936784]
Introducing a thin Ag layer on a metallic precursor in kesterite solar cells effectively improves device characteristics and performance in ACZTSSe solar cells, reducing the Voc-deficit and enhancing efficiency.
A cation substitution in Cu2ZnSn(S,Se)(4) (CZTSSe) oilers a viable strategy to reduce the open-circuit voltage (V-oc)-deficit by altering the characteristics of band-tail states, antisite defects, and related defect clusters. Herein, we report a facile single process, i.e., simply introducing a thin Ag layer on a metallic precursor, to effectively improve the device characteristics and performances in kesterite (Ag-x,Cu1-x)(2)ZnSn(S-y,Se1-y)(4) (ACZTSSe) solar cells. Probing into the relationship between the external quantum efficiency derivative (dEQE/d lambda) and device performances revealed the V-oc-deficit characteristics in the ACZTSSe solar cells as a function of Cu and Ag contents. The fabricated champion ACZTSSe solar cell device showed an efficiency of 12.07% and a record low V-oc-deficit of 561 mV. Thorough investigations into the mechanism underpinning the improved performance in the ACZTSSe device further revealed the improved band-tailing characteristic, effective minority carrier lifetime, and diode factors as well as reduced antisite defects and related defect clusters as compared to the CZTSSe device. This study demonstrates the feasibility of effectively suppressing antisite defects, related defect clusters, and band-tailing characteristics by simply introducing a thin Ag layer on a metallic precursor in the kesterite solar cells, which in turn effectively reduces the V-oc-deficit.
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