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ZnO single crystal was used as the substrate to study the effect of ZnO crystal plane polarity on the morphology and structure of CH_3NH_3PbI_3(MAPbI_3) perovskite film and carrier transport properties,which is meaningful for improving ZnO-based perovskite solar cell. It is found that perovskite thin film has small grain size(about 190 nm) and high coverage rate on the O-face of ZnO single crystal,and the dominant exposed crystal plane of perovskite film is(110) plane. While the MAPbI_3 thin film has large grain size(about 1.03 μm) and low coverage rate on the Zn-face,and the(022) plane is dominantly exposed for the perovskite film. The injection of photogenerated electrons from MAPbI_3 film into the O-face of ZnO single crystal is faster and more effective than that to Zn-face. It is supposed that O-face is more suitable for ZnO single crystal based perovskite cell fabrication than Zn-face.
ZnO single crystal was used as the substrate to study the effect of ZnO crystal plane polarity on the morphology and structure of CH_3NH_3PbI_3 (MAPbI_3) perovskite film and carrier transport properties, which is meaningful for improving ZnO-based perovskite solar cell. perovskite thin film has a small grain size (about 190 nm) and high coverage rate on the O-face of ZnO single crystal, and the dominant exposed crystal plane of perovskite film is (110) plane. While the MAPbI_3 thin film has large grain size (about 1.03 μm) and low coverage rate on the Zn-face, and (022) plane is dominantly exposed for the perovskite film. The injection of photogenerated electrons from MAPbI_3 film into the O-face of ZnO single crystal is faster and more effective than that to Zn-face. It is that that O-face is more suitable for ZnO single crystal based perovskite cell fabrication than Zn-face.