Research Article
Effect of Annealing Process on CH3NH3PbI3-XClX Film Morphology of Planar Heterojunction Perovskite Solar Cells with Optimal Compact TiO2 Layer
Figure 2
Top view SEM images of c-TiO2 film with different spin coating speeds for 60 s. (a), (c), and (e) the low magnification and (b), (d), and (f) the high magnification images for 1000 rpm, 2000 rpm, and 3000 rpm, respectively.
| (a) |
| (b) |
| (c) |
| (d) |
| (e) |
| (f) |