title: α-NaYb(Mn)F4:Er(3+)/Tm(3+)@NaYF4 UCNPs as "Band-Shape" Luminescent Nanothermometers over a Wide Temperature Range.
abstract: Novel flower-like α-NaYb(Mn)F4:Er(3+)/Tm(3+)@NaYF4 upconversion nanoparticles (UCNPs) as luminescent nanothermometers have been developed by combining liquid-solid solution hydrothermal strategy with thermal decomposition strategy. Under 980 nm excitation, they exhibit intense upconversion luminescence and temperature-dependent upconversion luminescence over a wide temperature range. The influence of temperature on "band-shape" upconversion luminescence (UCL) spectra and the intensity of emission bands are analyzed and discussed in detail. We further successfully test and verify that intensity ratios REr of (2)H11/2 → (4)I15/2 and (4)S3/2 → (4)I15/2 and RTm of (1)G4 → (3)H5 and (3)H4 → (3)H6 are sensitive to temperature, and the population of active ions follows Boltzmann-type population distribution very well. These luminescent nanothermometers could be applied over a wide temperature range from 123 to 423 K with high sensitivity, which enable them to be excellent candidates for temperature sensors.
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
authors: Xia
authors: X
authors: Xu
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
authors: Zhuo
authors: Z
authors: Wang
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
authors: Pengpeng
authors: P
authors: Lei
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.
authors: Yingning
authors: Y
authors: Yu
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.
authors: Shuang
authors: S
authors: Yao
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.
authors: Shuyan
authors: S
authors: Song
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.
authors: Xiuling
authors: X
authors: Liu
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
authors: Yue
authors: Y
authors: Su
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
authors: Lile
authors: L
authors: Dong
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.
authors: Jing
authors: J
authors: Feng
authors: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , 5625 Renmin Street, Changchun, Jilin 130022, China.
authors: Hongjie
authors: H
authors: Zhang
keywords: band-shape; lanthanide; luminescent nanothermometer; sensitivity; thermally coupled; upconversion nanoparticles