Figure 2

SEM top-view and cross-sectional images of the selenized CIGSSe film treated with (a,b) 0.2 M NaCl, (c,d) 0.5 M NaCl, (e,f) 0.1 M NaCl aqueous solutions for 20 minutes, and (g,h) untreated CIGSSe samples.

SEM top-view and cross-sectional images of the selenized CIGSSe film treated with (a,b) 0.2 M NaCl, (c,d) 0.5 M NaCl, (e,f) 0.1 M NaCl aqueous solutions for 20 minutes, and (g,h) untreated CIGSSe samples.