Optimized tellurite glasses containing CsPbBr3-quantum dots for white-light emitting diodes

•Highly luminescent CsPbBr3 PQDs are successfully embedded in a stable tellurite glass host.The influence of structural changes on PL properties is studied.•The enhancement mechanisms related to the Ag doping and structural changes are revealed.•The PLQYs of CsPbBr3 are significantly enhanced to 33.9% in tellurite glasses. Highly luminescent CsPbBr3 perovskite quantum dots (PQDs)-doped tellurite glasses are prepared by the cost-effective and reproducible melt-quenching and thermal heating method. The photoluminescence quantum yields (PLQYs) are significantly enhanced to 33.9% by glass structural modification and Ag doping. The enhancement mechanisms especially that related to the Ag doping are comprehensively discussed according to high-resolution transmission electron microscope analysis and the first-principles calculation for the first-time. The glass structure dependences of PL emissions are studied as a function of temperature from 78 K to 318 K. Based on the optimized glass sample, robust temperature-, irradiation- and high-current-resistant (up to the highest level of 300 mA yet reported) white light-emitting diode module is realized with an external quantum yield of 20%, a luminous efficiency of 65 lm/W, a correlated color temperature of 4063 K and a good color stability.