Preparation and Characterization of Cu₂ZnSnS₄ Thin Films and Solar Cells Fabricated from Quaternary Cu-Zn-Sn-S Target

Figure 3

(a) Surface morphology of the sputtered films; (b) cross-section morphology of the sputtered films; (c) surface morphology of the sulfurized films; (d) cross-section morphology of the sulfurized films.

(a)

(b)

(c)

(d)