Influence of H2Se concentration on Se-rich CZTSSe absorbers sputtered with a ceramic quaternary target. Issue 9 (15th June 2020)

• Record Type: Journal Article
• Authors: Ren, Guoan; Zhuang, Daming; Zhao, Ming; Wei, Yaowei; Wu, Yixuan; Li, Xinchen; Lyu, Xunyan; Wang, Chen; Li, Yuxian
• Is Part Of: Ceramics international. Volume 46:Issue 9(2020)
• Page Start: 13704
• Page End: 13710
• Publication Date: 2020-06-15
• Subjects: CZTSSe solar cells -- Sputtering -- Ceramic quaternary CZTS target -- Selenization; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.02.158
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Se-rich CZTSSe absorbers with large grains are important contributors to the performances of CZTSSe solar cells and can be fabricated by the selenization of as-sputtered CZTS precursors. To explore the effects of the H2 Se concentration in the annealing atmosphere on the growth of CZTSSe phases, sputtered CZTS precursors were subjected to annealing with a mixed gas of Ar and H2 Se at different concentrations. A series of characterization techniques were employed to investigate the morphologies, phase structures, surface states, and elemental compositions of the annealed samples. The results demonstrate that the H2 Se concentration in the annealing atmosphere can significantly affect the grain size, suppressing the decomposition of CZTSSe absorbers. When the H2 Se concentration in the annealing atmosphere reaches 4.5 vol%, a selenium-enriched CZTSSe absorber that is composed of the pure kesterite structure and that has densely packed large grains and a high concentration of selenium was obtained. The highest efficiency of 10.12% of CZTSSe solar cells was achieved herein.