Effect of thermal pretreatment of metal precursor on the properties of Cu<sub>2</sub>ZnSnS<sub>4</sub> films<xref ref-type="fn" rid="cpb141997fn1">*</xref>

Effect of thermal pretreatment of metal precursor on the properties of Cu₂ZnSnS₄ films*

Wang Wei^a), Shen Hong-Lie^a),^b)†, Jin Jia-Le^a), Li Jin-Ze^a), Ma Yue^c)

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.