Optical thermometry through green upconversion emissions in Er 3+/Yb 3+-codoped CaWO 4 phosphor

Wei Xu, Xiaoyang Gao, Longjiang Zheng, Peng Wang, Zhiguo Zhang, Wenwu Cao

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

Under 980nm excitation, the temperature-dependent green upconversion emissions from Er 3+/Yb 3+-codoped CaWO 4 phosphor were studied at temperatures from 294 to 923 K. By using the fluorescence intensity ratio technique, the maximum sensitivity for temperature measurement achieved here is approximately 0.0092 K -1, which is much higher than previously reported temperature sensors based on the fluorescence of Er 3+ions in other host materials. With the efficient upconversion fluorescence, the Er 3+/Yb 3+-codoped CaWO 4 is a very promising candidate for optical high-temperature sensors with high sensitivity and good accuracy.

Original languageEnglish (US)
Article number072201
JournalApplied Physics Express
Volume5
Issue number7
DOIs
StatePublished - Jul 1 2012

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Phosphors
phosphors
temperature measurement
Fluorescence
temperature sensors
Temperature sensors
fluorescence
sensitivity
Temperature measurement
Temperature
temperature
Ions
excitation
ions

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Xu, Wei ; Gao, Xiaoyang ; Zheng, Longjiang ; Wang, Peng ; Zhang, Zhiguo ; Cao, Wenwu. / Optical thermometry through green upconversion emissions in Er 3+/Yb 3+-codoped CaWO 4 phosphor. In: Applied Physics Express. 2012 ; Vol. 5, No. 7.
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Optical thermometry through green upconversion emissions in Er 3+/Yb 3+-codoped CaWO 4 phosphor. / Xu, Wei; Gao, Xiaoyang; Zheng, Longjiang; Wang, Peng; Zhang, Zhiguo; Cao, Wenwu.

In: Applied Physics Express, Vol. 5, No. 7, 072201, 01.07.2012.

Research output: Contribution to journalArticle

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AU - Cao, Wenwu

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