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A Single Nonblinking Cs 4 PbBr 6 Nanoparticle as a Nanothermometer
Author(s) -
Lei Yanyu,
Yang Jie,
Hong Daocheng,
Wan Sushu,
Hua Yan,
Xie Mingcai,
Tang Xiaosheng,
Tian Yuxi
Publication year - 2019
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201800619
Subject(s) - photoluminescence , nanoparticle , intensity (physics) , atmospheric temperature range , thermal stability , perovskite (structure) , analytical chemistry (journal) , chemistry , luminescence , particle (ecology) , materials science , nanotechnology , optoelectronics , optics , crystallography , thermodynamics , chromatography , physics , oceanography , organic chemistry , geology
Inorganic perovskite materials have attracted broad interest in the last several years due to their stability and promising applications as photovoltaic and light‐emitting materials. In this work, we prepared Cs 4 PbBr 6 nanoparticles showing stable photoluminescence (PL) without blinking and studied the PL properties of individual Cs 4 PbBr 6 nanoparticles in the biological temperature range. We found that both PL intensity and lifetime of a single Cs 4 PbBr 6 particle strongly depends on the temperature. The PL intensity and lifetime decrease almost linearly with the increasing of the temperature. The slopes of the PL intensity and lifetime versus temperature were as high as 2% and 3% per degree centigrade, respectively. The photostability and thermal stability were also checked for individual particles. With these results, we proposed that the sensitivity of PL intensity and lifetime of a single Cs 4 PbBr 6 nanoparticle on temperature showed the potential application of a single particle as a nanothermometer for thermal detection in a local environment.