The Application of Perovskite Quantum Dots in Photodetectors

Abstract

Abstract Perovskite quantum dots (PQDs) can adsorb visible light and give out fluorescence or excited electron to the surroundings. Therefore, some kinds of PQDs can be used for light detection. Due to the appropriate band gap, cesium bromide and iodide-based perovskite PQDs (i.e. CsPbX3) are especially suitable for visible light detection. Some other kinds of PQDs with different photoluminescence spectrum can be used to detect ultra-violet light or infrared light. In this paper, PQD-based photodetectors are divided into three categories: photoresistors, photodiodes and field effect transistors. Herein, the device structures, characteristics and mechanism of these three types of PQD-based photodetectors are briefly reviewed. Other applications of PQDs are also briefly introduced, including selective ion detection and organic molecular detection associated with molecular imprinted polymers.