Figure 2: Film and device morphologies.
From: Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells
Top-view SEM images of the CH3NH3PbI3-xClx films on FTO (a) with and (b) without UVO treatment. Scale bar, 10 μm. (c) Top-view SEM image of the HTL on a CH3NH3PbI3-xClx film deposited on FTO with UVO treatment. Scale bar, 10 μm. (d) Cross-sectional SEM image of a complete device. Scale bar, 1 μm.
