Optical temperature sensing through the upconversion luminescence from Ho3+/Yb3+ codoped CaWO4

Wei Xu, Hua Zhao, Yaxin Li, Longjiang Zheng, Zhiguo Zhang, Wenwu Cao

Research output: Contribution to journalArticlepeer-review

167 Scopus citations


Under 980 nm diode laser excitation, efficient upconversion emissions from the Ho3+/Yb3+ codoped CaWO4 phosphor were obtained. The upconversion quantum efficiency was evaluated to be about 3.3% when the power density of the excitation laser was 47 W/cm2. Additionally, temperature dependent blue emissions from the 5F 2,3/3K8 and 5G6/ 5F1 states of Ho3+ ions were studied in the range of 303-923 K. The result demonstrated that using the ratio between the blue luminescence intensities of Ho3+ ions, the sensitivity and the accuracy for optical thermometry achieved here are superior to the previously reported Er3+ green fluorescence based optical temperature sensors.

Original languageEnglish (US)
Pages (from-to)1096-1100
Number of pages5
JournalSensors and Actuators, B: Chemical
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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