UV photodetector properties of CsPbCl3 grown by Vertical Bridgman method

• High-quality CsPbCl 3 crystals with lengths longer than 5 cm were obtained by the vertical Bridgeman method. • XRD, TG-DTA, steady-state photoluminescence (PL) and absorption of CsPbCl 3 Crystal was investigated. • Ultraviolet (UV) photodetector was manufactured, which exhibits low dark current(0.88nA), high detectivity (3.3 × 10 10 jones), shorter response time(104 ms). • This device shows good stability and repeatability in natural setting due to stability of all-inorganic perovskite structures and high-quality crystal. The all-inorganic perovskite CsPbCl 3 holds significant promise in ultraviolet (UV) photodetector due to its good optoelectronic properties and suitable band gap. Owe to the limited solubility of CsCl in the precursor solution, most CsPbCl 3 material obtained by the solution method are nanocrystals, and only a few UV photodetectors based on CsPbCl 3 crystal have been reported. It is proved that single crystal has fewer defects and grain boundaries, making them more suitable for photodetectors than polycrystals. In this study, high-quality CsPbCl 3 crystal was obtained by the Vertical Bridgman method, and planar Au/CsPbCl 3 /Au photodetector was constructed by magnetron sputtering. The photodetector performance was investigated and it shows the low dark current of 0.88nA, the Detectivity up to 3.3 × 10 10 Jones and the fastest response time of 104 ms. The detector also demonstrated good stability. This work indicates that CsPbCl 3 crystals can be used as UV detectors.