Dy3+ Doped All‐Inorganic Perovskite Nanocrystals Glass toward High‐Performance and High‐Stability Silicon Photodetectors

Abstract Silicon (Si) photodetectors (PDs) have attracted more attention due to their wide applications, but are limited by their extremely weak ultraviolet (UV) photo‐response. Herein, Dy 3+ ‐CsPbCl 2 Br 1 nanocrystals glass (Dy 3+ ‐CPCB NCsG) is synthesized in borosilicate glass by traditional melt‐quenching. The doping of Dy 3+ exceedingly improves the PL intensity of CsPbCl 2 Br 1 nanocrystals glass (CPCB NCsG) with enhancing photoluminescence quantum yield from 8.0% to 30.2%, ascribed to the improved crystallinity and reduced defects. Meanwhile, the stability of CPCB NCsG exposed to air, light, and high temperature is largely boosted. After integrating with Dy 3+ ‐CPCB NCsG, the responsivity, external quantum efficiency, detectivity, and stability of Si PDs are significantly enhanced. The responsivity ( R ) of Si PDs‐5% Dy 3+ ‐CPCB NCsG is 0.006 A W −1 at 320 nm, which is sixfold higher than that of bare Si PDs. This work develops a blue Dy 3+ ‐CPCB NCsG, which has great potential as a new luminescent material for the next generation of Si PDs.