skip to main content

SciTech ConnectSciTech Connect

Title: Luminescence thermometry below room temperature via up-conversion emission of Y{sub 2}O{sub 3}:Yb{sup 3+},Er{sup 3+} nanophosphors

This study explores potential of Er{sup 3+}-Yb{sup 3+} doped phosphors for up-conversion luminescence thermometry in the temperature range from 10 K to 300 K. Yttrium oxide nanopowder doped with trivalent ytterbium and erbium ions (Y{sub 1.97}Yb{sub 0.02}Er{sub 0.01}O{sub 3}) was prepared by hydrothermal synthesis as an example. The intensity ratios of up-conversion emissions from thermally coupled {sup 2}H{sub 11/2} and {sup 4}S{sub 3/2} levels of Er{sup 3+} show strong temperature dependence (in the range 150 K–300 K) with much higher relative sensitivity than those reported for thermometry above room temperature with Er{sup 3+}-Yb{sup 3+} based up-conversion materials. The maximal value of relative sensitivity is 5.28%K{sup −1} at 150 K, with temperature resolution ranging from 0.81 K to 0.06 K. In addition, the intensity ratios of emission from thermally non-coupled Er{sup 3+} levels ({sup 2}H{sub 9/2} and {sup 4}F{sub 9/2}) and from {sup 4}S{sub 3/2} also show temperature dependence that can be approximated with an exponential function. With these up-conversion emission ratios, it is possible measure temperature in the range of 10 K to 300 K with excellent sensitivity and resolution.
Authors:
; ;  [1]
  1. Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, Belgrade 11001 (Serbia)
Publication Date:
OSTI Identifier:
22304316
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DOPED MATERIALS; ERBIUM ADDITIONS; HYDROTHERMAL SYNTHESIS; LUMINESCENCE; NANOSTRUCTURES; PHOSPHORS; POWDERS; RESOLUTION; SENSITIVITY; TEMPERATURE DEPENDENCE; TEMPERATURE MEASUREMENT; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; YTTERBIUM ADDITIONS; YTTRIUM OXIDES