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Performance improvement of temperature sensor based on rare-earth ion fluorescence by using KBr-diluted phosphor

  • Ning Yuan
  • , Hong Xue Sun
  • , Zi Bo Zhang
  • , Qi Sun
  • , Wing Han Wong
  • , Dao Yin Yu
  • , Edwin Yue Bun Pun
  • , De Long Zhang*
  • *Corresponding author for this work
  • Tianjin University
  • University of Toulouse 3
  • City University of Hong Kong

Research output: Contribution to journalArticlepeer-review

Abstract

We exemplify the Er(NbO3)3 phosphor to demonstrate that the performance of the temperature sensor based on thermal effect of fluorescence intensity ratio (FIR) of 980-nm-upconverted Er3+ green 530 and 550 nm emissions can be improved by using KBr-diluted phosphor. The sensing performance of the diluted phosphor plate was studied as a function of KBr:Er(NbO3)3 molar ratio from 0:1 to 100:1. The results show that the KBr dilution enables to enhance the fluorescence intensity and increase the temperature sensitivity. Meanwhile, the KBr itself does not affect either the Er3+ spectroscopic properties or the FIR value. There is an optimum KBr: Er(NbO3)3 molar ratio within 15:1 and 20:1, for which the 530 (550) nm signal increases by 30% (20%) and the relative sensitivity at the physiological temperature increases by 14%.

Original languageEnglish
Pages (from-to)573-575
Number of pages3
JournalMaterials Letters
Volume185
DOIs
StatePublished - 15 Dec 2016
Externally publishedYes

Keywords

  • Fluorescence intensity ratio (FIR)
  • KBr dilution
  • Optical temperature sensor
  • Sensing performance

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