Adhesion Improvement and Characterization of Magnetron Sputter Deposited Bilayer Molybdenum Thin Films for Rear Contact Application in CIGS Solar Cells

Figure 5

Surface-view and cross-sectional SEM images of bilayer Mo films with different thickness ratios of the bottom and top Mo layers: (a) 90 nm/810 nm, (b) 270 nm/630 nm, and (c) 450 nm/450 nm.

(a) Mo 90 nm/810 nm

(b) Mo 270 nm/630 nm

(c) Mo 450 nm/450 nm

(d) Mo 90 nm/810 nm

(e) Mo 270 nm/630 nm

(f) Mo 450 nm/450 nm