Development of high-performance ultrafast photodetector using CsPbBr3 perovskite single crystal

Abstract

Here, we have developed a high-performance photodetector with enhanced photoelectric conversion efficiency and rapid response kinetics using an inorganic CsPbBr3 perovskite single crystal (PSC). A large area of high-quality PSC has been synthesized using a novel modified inverse temperature crystallization (ITC) process. The formation of the single crystal of the CsPbBr3 perovskite in an orthorhombic phase was confirmed by the X-ray diffraction (XRD) spectra while the excellent light absorption characteristics are corroborated with UV-Vis studies. A proposed Metal-Semiconductor-Metal (M-S-M) photodetector device structure using the CsPbBr3 PSC (Au/CsPbBr3/Au) has been examined by using monochromatic light in a wavelength range of 350–700 nm. The PSC photodetector exhibits excellent spectral responsivity of ∼ 0.42 A/W, detectivity of 6.26 × 1010 Jones, and external quantum efficiency of ∼ 95% with an ultrafast response/recovery time of ∼ 40/35 ms. Such excellent results unveil a new perspective in the PSC-based next-generation optoelectronic devices.