Development of a Selective Chemical Etch To Improve the Conversion Efficiency of Zn-Rich Cu2ZnSnS4 Solar Cells
A Fairbrother, E García-Hemme… - Journal of the …, 2012 - ACS Publications
Improvement of the efficiency of Cu2ZnSnS4 (CZTS)-based solar cells requires the
development of specific procedures to remove or avoid the formation of detrimental
secondary phases. The presence of these phases is favored by the Zn-rich and Cu-poor
conditions that are required to obtain device-grade layers. We have developed a selective
chemical etching process based on the use of hydrochloric acid solutions to remove Zn-rich
secondary phases from the CZTS film surface, which are partly responsible for the …
development of specific procedures to remove or avoid the formation of detrimental
secondary phases. The presence of these phases is favored by the Zn-rich and Cu-poor
conditions that are required to obtain device-grade layers. We have developed a selective
chemical etching process based on the use of hydrochloric acid solutions to remove Zn-rich
secondary phases from the CZTS film surface, which are partly responsible for the …
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