The Preparation Of Caesium Lead Halide Nanocrystalline Glass And Its Application In White Led And Phot Ocatalytic H₂ Production

All-inorganic cesium lead halide?Cs Pb X₃?perovskite nanocrystals?NCs?are applied in optics and optoelectronics due to their high photoluminescence quantum efficie ncy,narrow-band emission,tunable emission wavelength.However,its poor stability and environmental problems caused by toxic elemental lead hinder its application.In order to improve the water stability of Cs Pb X₃NCs,we incorporated them into a more stable and compact inorganic glass matrix for application in photocatalytic hydrogen production via water splitting.According to the above research points,the main contents are as the following:1.CsPb_1-xTi_xBr₃NCs glass was prepared by melt-thermal quenching and in-situ nanocrystallization.The prepared glass-ceramics were combined with red phosphors and matched with blue-light chips to construct white LED devices with adjustable CCT?4750-8787 K?,CRI?61.8-74.8?,LE?38.15-47.22 lm/W?,indicating that the material is expected to be used in solid-state lighting devices.2.The band gap,structure and morphology of Cs Pb Br_1.5Cl_1.5NCs were characterized by UV-vis,XRD,XPS,TEM and stability analysis.The results showed that the band gap was consistent with the requirements of photocatalytic hydrogen production,and the water stability was greatly improved,and remained active after three cycles of continuous irradiation.It indicates that Cs Pb Br_1.5Cl_1.5NCs glass can be applied to the field of photocatalytic hydrogen production via water splitting.