Issue 32, 2019

Glass stabilized ultra-stable dual-emitting Mn-doped cesium lead halide perovskite quantum dots for cryogenic temperature sensing

Abstract

Mn-Doped CsPb(Cl/Br)3 quantum dots possess multi-functional optical, electronic and magnetic characteristics. However, they usually suffer from decomposition in air, and Mn2+ dopants will be gradually expelled from the perovskite host due to a radius mismatch between Pb2+ and Mn2+. To solve these crucial issues, the synthesis of glass stabilized Mn-doped quantum dots via an appropriate glass composition design and in situ glass crystallization is reported. Mn2+ dopants act as nucleating agents to promote the nucleation/growth of CsPb(Cl/Br)3 from B–P–Zn–Cs–Pb based oxyhalide glass and partition into the perovskite host to produce dual-color luminescence via efficient exciton-to-dopant energy transfer. Benefitting from the effective protection of robust glass, Mn-doped CsPb(Cl/Br)3 quantum dots exhibit superior water resistance and thermal stability. Particularly, almost 100% luminescence is retained after immersing the composite in water for 30 days. Interestingly, rapid thermal quenching for exciton recombination relative to Mn2+ d–d transition at cryogenic temperatures enables its promising applications as a ratiometric temperature sensing medium.

Graphical abstract: Glass stabilized ultra-stable dual-emitting Mn-doped cesium lead halide perovskite quantum dots for cryogenic temperature sensing

Supplementary files

Article information

Article type
Communication
Submitted
09 јул. 2019
Accepted
22 јул. 2019
First published
23 јул. 2019

Nanoscale, 2019,11, 15010-15016

Glass stabilized ultra-stable dual-emitting Mn-doped cesium lead halide perovskite quantum dots for cryogenic temperature sensing

B. Zhuang, Y. Liu, S. Yuan, H. Huang, J. Chen and D. Chen, Nanoscale, 2019, 11, 15010 DOI: 10.1039/C9NR05831A

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