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. 2015 Sep 8;6:8238. doi: 10.1038/ncomms9238

Figure 1. Hybrid perovskite phototransistors.

Figure 1

(a) Schematic of the phototransistor with a channel of hybrid perovskite CH3NH3PbI3. (b) Ultraviolet–visible absorption of the 100-nm CH3NH3PbI3 film. The inset shows a direct bandgap of ∼1.53 eV. (c) X-ray diffraction spectrum of the CH3NH3PbI3 film. (d) Top-view SEM image of the perovskite film. Scale bar, 0.5 μm. (e) Tapping-mode AFM height image of the perovskite film. Scale bar, 1.0 μm. Inset: the corresponding three-dimensional topographic image.