Abstract

Quaternary Cu₂ZnjSnjS₄ (CZTS) is known as a potential thin-film material in solar cells due to its earth abundant and environmentally friendly constituents.¹ However, few works have been reported on ternary CTS compounds. This study compared the optical and structural properties of CTS thin-film absorbers that were prepared by electroplating Cu/Sn layers onto glass/Mo substrates and sulfurization. Particularly, alloying of Cu/Sn layers was performed in low temperature before a high temperature sulfurization. The alloying was conducted at 170–220 °C for 60–90 min in vacuum. The sulfurization was conducted at 560 °C for 30–60 min in a tubular furnace that was filled with sulfur vapor and N₂ gas.

© 2013 Japan Society of Applied Physics, Optical Society of America