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Issue 32, 2019
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Glass stabilized ultra-stable dual-emitting Mn-doped cesium lead halide perovskite quantum dots for cryogenic temperature sensing

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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

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Supplementary files

Article information


Submitted
09 Jul 2019
Accepted
22 Jul 2019
First published
23 Jul 2019

Nanoscale, 2019,11, 15010-15016
Article type
Communication

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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