Effect of Ga/Cu Ratio on Polycrystalline CuGaSe_𝟐 Thin Film Solar Cell

Figure 2

Cross-sectional SEM images of the as-grown CuGaSe₂ thin films. Various CuGaSe₂ layers were grown with changing Ga/Cu ratio in the film (a) Ga/Cu = 2.04, (b) Ga/Cu = 1.45, (c) Ga/Cu = 1.05, and (d) Ga/Cu = 0.89.

(a)

(b)

(c)

(d)