Effect of thermal pretreatment of metal precursor on the properties of Cu2ZnSnS4 films |
SEM images of CZTS films prepared with different pretreatment temperatures: (a) no pretreatment, (b) 200 °C, (c) 300 °C, (d) 350 °C, (e) 400 °C; (f) cross-sectional image of CZTS film pretreated at 350 °C. |