Collaborative regulation of glass network relaxation and crystallization kinetics enables perovskite quantum dot glass with effectively enhanced luminescence and stability

Perovskite quantum dot (PQD) glass often suffers from poor control of nucleation and growth. In this study, we systematically explore the role of NaF doping (0–10 mol%) in regulating the network structure and in-situ crystallization behavior of CsPbBr 3 PQDs embedded in borosilicate glass. Moderate NaF (8 mol%) depolymerizes the network by increasing non-bridging oxygen and enlarges local free volume, which lowers the crystallization barrier from 52 kJ/mol to 46 kJ/mol and enables uniform in-situ crystallization within a narrow heat-treatment window. Consequently, the photoluminescence quantum yield rises from 10.3 % (undoped) to 87 % (8 mol%). The optimized glass maintains 96.5 % of its initial PL intensity after thermal cycling (25–200 °C), 92 % after 30 days of UV exposure, and 98 % after 30 days of water immersion. These findings highlight NaF's dual role as both a network modifier and a kinetic crystallization regulator, and provide a composition-temperature window for the design of high-efficiency, environmentally robust PQD glasses for optoelectronic applications.