Nickel Doping Unlocks Ambient-Condition Photostability in Individual Cesium Lead Bromide Perovskite Quantum Dots.

ABSTRACT: Developing efficient single-photon sources is fundamental to advancing photonic quantum technologies. In particular, achieving scalable, cost-effective, stable, and high-purity single-photon emission at ambient conditions is paramount for free-space quantum communication. However, fulfilling all the requirements simultaneously under ambient conditions has remained a significant challenge. Here we present the scalable, cost-effective ambient condition synthesis of nickel-doped CsPbBr₃ perovskite quantum dots (NPQDs) using a modified ligand-assisted reprecipitation method. The resulting individual NPQDs demonstrate remarkable photostability, sustaining their performance for over 10 min under ambient conditions, and exhibit exceptional single-photon purity (>99%) with a narrow emis

SUBMITTER: Ryu J 

PROVIDER: S-EPMC12670497 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature