In Situ Growth of Quantum Dots in Glass Matrices: Novel Paradigms for Advanced Optical Materials

Abstract Quantum dots (QDs) are semiconductor nanocrystals with superior quantum efficiency, narrow emission linewidths, and tunable bandgaps, making them valuable in optoelectronics. However, their commercialization is hindered by instability under stress and environmental concerns related to heavy metal leaching. To address these issues, advanced encapsulation strategies, particularly using inorganic glass matrices (silicate, phosphate, borate), are crucial. This review examines the structure‐property relationships between these matrices and QD variants (perovskite, chalcogenide). It highlights how glass host engineering through network modifiers and phase separation control affects QD growth, defect passivation, and stability. Host‐guest interactions at the glass‐QD interface enhance photoluminescence quantum yield (15–40%), narrow emission linewidths, and improve thermal quenching resistance (30–50% efficiency retention at 150 °C). These advancements enable emerging applications in solid‐state lighting, mini‐LED backlights, and X‐ray detectors. This analysis provides insights into glass‐mediated QD engineering and paves the way for eco‐friendly photonic materials.