Synthesis and optical properties of novel mixed-metal cation CsPb1−xTixBr3-based perovskite glasses for W-LED

In this report, a mixed-metal cation-based halide perovskite (HP) CsPb 1− x Ti x Br 3 quantum dots (QDs) were first embedded in the B–Si–Zn glasses using a traditional approach of melt quenching and heat treating. A battery of test results such as photoluminescence, X-ray diffraction, and time-resolved attenuation prove that Ti ions do not destroy the properties of CsPbBr 3 , and they are successfully doped into CsPbBr 3 . At the same time, the doping of Ti ions also reduces the toxicity of lead. By altering the ratio of Pb/Ti, we determined the optimum ratio of CsPb 0.7 Ti 0.3 Br 3 QDs through experimental data. Due to the excellent optical properties and stability of CsPb 0.7 Ti 0.3 Br 3 QDs glass, it was designed to construct the white-light emitting diode device with tunable color coordinate, color rendering index, correlated color temperature, and a high luminous efficiency compared with CsPbBr 3 QDs glass, which may be a promising candidate for the field of lighting and displays.