Antisolvent-Induced Fastly Grown All-Inorganic Perovskite CsPbCl3 Microcrystal Films for High-Sensitive UV Photodetectors

CsPbCl3-based inorganic perovskite ultraviolet photodetectors (UV-PDs) have a great promise for the wide application prospects due to the desirably UV-matched energy band and the excellent intrinsic optoelectronic properties. However, the traditional high-temperature Bridgman method (near 600 degrees C) and complexly time-consuming vapor preparation (several days) of high-quality CsPbCl3 crystals have badly restricted its commercial applications to date. Herein, an antisolvent-induced crystallization kinetics (ACK) strategy is demonstrated for the quick lower-temperature fabrication (50 degrees C, tens of minutes) of excellent continuous highly crystalline CsPbCl3 microcrystal films (MCFs) with low trap density (1.42 x 10(12) cm(-3)). Further, the as-developed CsPbCl3 MCF-based UV-PDs present a high detectivity of 5.6 x 10(12) Jones, a superior responsivity of 2.11 A W-1, and robust stability. Evidently, this work provides a rapid and simple method to prepare high-quality perovskite MCFs, greatly promoting the commercial development of perovskite-based photodetectors.

Automated summary

This study demonstrates a rapid and simple method for preparing high-quality CsPbCl3 microcrystal films at lower temperature, improving the detection performance and stability of CsPbCl3 MCF-based UV-PDs, and contributing to the commercial development of perovskite-based photodetectors.