Secondary phases and temperature effect on the synthesis and sulfurization of CZTS

摘要

Copper, Zinc and Tin sulfides were synthesized by solution method employing Na2S as sulfur source. Individual sulfides were sulfurized in non-vacuum condition at 350, 450, 550 and 650 degrees C to obtain CZTS. Structural, optical and morphological analysis indicated major portion of CZTS along with secondary phases such as SnS2, SnS and Cu3SnS4 at 350 and 450 degrees C whereas the secondary phases vanishing significantly at 550 and 650 degrees C. The optical studies indicated high absorption coefficient for CZTS in the range of 10(4)-10(5) cm(-1). Electrochemical analysis demonstrated that the CZTS samples prepared by the current methodology could be very well used as absorber material in thinfilm solar cells.