Broadband absorption mechanism based on quantum dot glass for filtering field

Traditional filters are faced with the problems of high price and complex preparation process. It is necessary to find a new method or material to make up for these shortcomings. In this Letter, C s P b B r 3 nanocrystals with controllable size were prepared in a tellurite glass matrix by a simple and effective heat treatment process. The absorption wavelength of C s P b B r 3 quantum dots gradually shifted to red due to the quantum confinement effect. In addition, the intrinsic photoluminescence intensity of C s P b B r 3 quantum dots was reduced by C e 4 + -doped quantum dot C s P b B r 3 glass, which could shield a short wavelength of 200–530 nm. The uniformly distributed quantum dots ensure high transmittance ( > 80 % ) of a long wavelength (560–800 nm), demonstrating that the quantum dot glass material has a broad application prospect as a shortwave shielding material.