Title :
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
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;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
Conference_Location :
Tampa, FL
DOI :
10.1109/PVSC.2013.6744986
