Fabrication of self-assembly polycrystalline perovskite microwires and photodetectors

In this work, perovskite CH3NH3PbI3 (MAPbI3) microwires has been synthesized via a simple solution self-assembly method for facile fabrication of photoelectronic devices. A two-step growth process was proposed to elucidate the formation and growth mechanisms of the microwires. Also, a photodetector was fabricated and analyzed its photoresponse characteristics. The device presented a stable and repeatable photocurrent response. The on-off ratio was about 4.02×103 as well as the rise and decay time was 0.2 ms and 0.25 ms which are comparable even superior to other reported photodetectors of perovskite.