Dy 3+ Doped All‐Inorganic Perovskite Nanocrystals Glass toward High‐Performance and High‐Stability Silicon Photodetectors

• Published in: Laser & photonics reviews Vol. 17; no. 5
• Main Authors: Hao, Mengyang, Cheng, Shun, He, Ye, Xiang, Weidong, Ding, Nan, Xu, Wen, Ma, Chong‐Geng, Liang, Xiaojuan
• Format: Journal Article
• Language: English
• Published: 01.05.2023
• ISSN: 1863-8880; 1863-8899
• DOI: 10.1002/lpor.202200748

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.