Benign solution processed Cu2ZnSn(Se, S)4 photovoltaic

Author

Chia-Jung Hsu ; Hsin-Sheng Duan ; Wenbing Yang ; Huanping Zhou ; Yang Yang

Author_Institution

Dept. of Mater. Sci. & Eng., Univ. of California Los Angeles & California, Los Angeles, CA, USA

fYear

2013

fDate

16-21 June 2013

Firstpage

2511

Lastpage

2514

Abstract

Solution-based approach to process earth-abundant Cu2ZnSn(Se, S)₄ is proved to be a promising route for thin-film photovoltaic fabrication. Combining fully dissolved zinc/tin (Zn/Sn) and copper (Cu) hydrazinuim constituents in the ethanolamine (EA) and its mixture with dimethylsulfoxide (DMSO) forms the CZTS precursor, which facilitates the composition adjustment. All solutes in this precursor solution are in molecular scale intermixed with excellent homogeneity. Innovated 2-step annealing using sulfur and selenium vapor sequentially assists continuous grain growth, and prevents Mo(S, Se)₂ formation. Resulting device achieves 7.5% power conversion efficiency.

Keywords

copper compounds; grain growth; selenium compounds; semiconductor thin films; solar cells; solution annealing; tin compounds; zinc compounds; CZTS precursor; Cu₂ZnSn(SeS)₄; DMSO; EA; benign solution processed photovoltaic cells; composition adjustment; continuous grain growth; dimethylsulfoxide; earth-abundant process; efficiency 7.5 percent; ethanolamine; hydrazinuim constituents; innovated 2-step annealing; molecular scale; thin-film photovoltaic fabrication; Films; Photovoltaic cells; Photovoltaic systems; Tin; Zinc; earth-abundant material; kesterite; photovoltaic; solution process;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th

Conference_Location

Tampa, FL

Type

conf

DOI

10.1109/PVSC.2013.6744986

Filename

6744986