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Influence of Chelants and Catalyst on Luminescence of CaAl2O4:Eu2+ Phosphors for Optical Temperature Sensing Applications

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Abstract:

This study synthesized CaAl2O4:Eu2+ blue phosphors using the sol-gel method. The effects of incorporating citric acid, poly (oxyethylene) (PEG), and HCl in the precursor on the luminescent properties of phosphors were investigated. No significant changes were observed in the photoluminescence (PL) spectra of the phosphors when different precursor solutions were used. However, the use of PEG and citric acid led to a noticeable decrease in the PL intensity. Notably, the use of HCl resulted in an increase in PL. In addition, upon heating the phosphors from room temperature to 110 °C, the PL spectrum remained unchanged, whereas the PL intensity decreased linearly with increasing temperature. This indicated the suitability of CaAl2O4:Eu2+ for optical temperature-sensing applications.

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Periodical:

Materials Science Forum (Volume 1128)

Pages:

39-44

DOI:

https://doi.org/10.4028/p-Z53tRy

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Online since:

October 2024

Authors:

Su Hua Yang*, Yi Yan Tsai, Chih Chieh Ho

Keywords:

Catalyst, Chelant, Luminescence, Phosphor, Temperature Sensing

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© 2024 Trans Tech Publications Ltd. All Rights Reserved

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