Stable borosilicate glass doped with CsPbBr3 quantum dots for efficient photodetectors

Cesium halide lead perovskite quantum dots (QDs) have attracted great attention in the field of optoelectronics due to their excellent photoelectric characteristics. Unfortunately, the susceptibility to anion exchange, instability in air and poor water resistance of perovskite QDs hinder their practical applications. In this study, borosilicate glass doped with CsPbBr3 QDs were prepared by traditional melt quenching and heat treatment procedures, which dramatically enhances the stability of perovskite QDs. The microstructures and luminescence properties of glass ceramics were carefully investigated. Intense green emissions were observed in the QDs doped glass under the excitation of ultraviolet light. More importantly, the photodetectors based on the CsPbBr3 QDs doped glass possess a high on/off photocurrent ratio of 104. The dynamic linear response range is large and the response speed is fast under low bias working condition. The results suggest that CsPbBr3 QDs doped glasses with high emission yield could find potential applications in highly efficiency photodetectors.