Morphology, optical and photoelectric properties of CH3NH3PbBr3 single crystal

Perovskite CH3NH3PbBr3 single crystals were synthesized by ITC method with DMF as solvent. X-ray diffraction was used to determine the structure of as-grown CH3NH3PbBr3 single crystal. The morphology of CH3NH3PbBr3 single crystal was measured by HRTEM and SEAD, and the result shows that the grown CH3NH3PbBr3 crystal is of good crystallinity. Optical properties were investigated by cathodoluminescence (CL) and photoluminescence (PL). The photoelectric performance of a photodetector based on CH3NH3PbBr3 single crystal was studied.The largest responsivity of the device is about 0.67 A/W, and the response time of photocurrent of the detector is 200 ms in the rise time and 250 ms in the fall time. Our results show CH3NH3PbBr3 single crystal has great potential for photoelectric device field. •The quality of the CH3NH3PbBr3 crystal grown was investigated by the micromorphology study.•The optical properties of CH3NH3PbBr3 crystal was firstly studied by CL.•Photoelectric properties of the CH3NH3PbBr3 crystal photodetector were studied.