Figure 8

Surface and cross-section SEM images of CZTSe thin films prepared by the various selenization conditions. (a-b) Without a tin source (A1), (c-d) with a tin source at a temperature of 400°C (A2), and (e-f) with a tin source at 530°C (A3).
Surface and cross-section SEM images of CZTSe thin films prepared by the various selenization conditions. (a-b) Without a tin source (A1), (c-d) with a tin source at a temperature of 400°C (A2), and (e-f) with a tin source at 530°C (A3).