Enhanced photoluminescence in germanium borate quantum dots glass via LiF modification

In recent years, the research of quantum dots (QDs) glass materials has made extensive progress, especially in the regulation of glass network structure to improve luminescence properties. In this study, germanium borate QDs glass was successfully prepared by the melt-quenching method. The results show that the addition of LiF loosens the glass network structure, facilitates the atomic rearrangement, promotes the precipitation of QDs, greatly optimizes the photoluminescence (PL) performance, increases the photoluminescence quantum yield (PLQY) from 10.5 % to 49.3 %. Significantly, the samples also have good chemical stability. This work provides guidance for modifying the network structure of germanium borate glass materials.