Luminescent Properties and Thermometry of CaWO₄:Nd³⁺ in Near Infrared Region

Abstract:

CaWO₄: xNd³⁺ (x = 0.005, 0.008, 0.01, 0.015, 0.02, 0.025 0.03) powders have been synthesized by high-temperature solid state reaction. The results of the XRD indicate that Nd³⁺ ions have entered into the crystal lattice in all compounds successfully. The reflectance spectra show that the matrix has strong absorption. The emission spectra, excitation spectra and different lifetimes between CaWO₄ and CaWO₄: 0.5% Nd³⁺ indicate that efficient energy transfer occurs from WO₄^2- cluster to Nd³⁺ ions. On the basis of the above work, the dependence of fluorescent spectra on temperature was studied. It turned out that, not only the excitation spectra appeared red shift with increasing temperature, but also the dependence of the near infrared fluorescent intensity on temperature is fitting with a linear function. It might be served as a promising phosphor for temperature sensor device.

• Periodical: Materials Science Forum (Volume 893)
• Pages: 156-160
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.893.156
• Online since: March 2017
• Authors: Rong Xue Wang, Xiao Bing Luo*
• Keywords: Fluorescence Intensity, Near Infrared, Thermometry

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