Hybrid organolead halide perovskite microwire arrays/single CdSe nanobelt for a high-performance photodetector

Abstract The hybrid approach by combining organic–inorganic halide perovskite with semiconductor materials is considered as an effective route in improving photosensitivity and broader spectral response of the photodetector. Here, a photodetector based on hybrid organolead halide perovskite microwire arrays (CH3NH3PbI3 MAs)/single Cadmium Selenide nanobelt (CdSe NB) has been successfully fabricated and characterized for the first time by one-step methods combining thermal evaporation. The hybrid structure can promote the effective separation of the generated electron-hole pairs in photoluminescence and thus exhibits an amazing optoelectric performance. The photo-to-dark current ratio is as high as 2.152 × 103, the responsivity, external quantum efficiency and photodetectivity are 69.11A/W, 11000% and 8.6 × 1012 Jones, respectively. Besides, the rise and decay time of the device are 0.81 ms and 0.77 ms, respectively. The excellent optoelectronic properties compared to those of other CH3NH3PbI3/semiconductor hybrids indicate CH3NH3PbI3 MAs/single CdSe NB hybrids are promising building blocks for optoelectronic applications.