Effects of Composition on Photoluminescence Properties of Organometal Halide Perovskites Quantum Dots

Abstract

Organometal halide perovskites material have recently emerged have shown great potential in photovoltaic and light emitting application. As an emerging nanomaterial, perovskite quantum dots have high fluorescence quantum yield, narrow half-peak width and fluorescence wavelength which can cover the whole visible region. Organometal halide perovskites quantum dots are one of the typical quantum dots, quantum dots have large exciton binding energy, quantum confinement effect, and therefore has a high fluorescence quantum yield. Because of its robust quantum size effect, regulate the size of quantum dots can achieve its performance adjustment. In this paper, the size of the perovskite quantum dots was adjusted by changing the composition and ratio of the halogen, thereby changing the forbidden bandwidth of the quantum dots to achieve the control of the emission wavelength. In this way, we study the optical properties of organometal halide perovskites quantum dots and understanding the quantum size effects of perovskite quantum dots and the ability to turn their size.