Research Article
Ambient Air and Hole Transport Layer Free Synthesis: Towards Low Cost CH3NH3PbI3 Solar Cells
Figure 3
(a) AFM micrographs of PbI2 film, (b) needle like morphology transformed to cuboids by wetting with CH3NH3I as is evident from AFM image, and (c) low magnification large area SEM micrograph. Scale bars in (a) and (b) represent 2 μm.
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