High Charge Carrier Storage Capacity in Lithium Lutetium Silicate Doped with Cerium and Thulium

Journal Article (2018)
Author(s)

Anna Dobrowolska (TU Delft - RST/Fundamental Aspects of Materials and Energy)

A. J.J. bos (TU Delft - RST/Luminescence Materials)

P. Dorenbos (TU Delft - RST/Luminescence Materials)

Research Group
RST/Luminescence Materials
DOI related publication
https://doi.org/10.1002/pssr.201800502
More Info
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Publication Year
2018
Language
English
Research Group
RST/Luminescence Materials

Abstract

It is demonstrate that LiLuSiO4:Ce,Tm has excellent charge carrier storage properties. Comparative studies are performed with the state-of-the art X-ray storage phosphor BaFBr(I):Eu. The thermoluminescence (TL) intensity of the optimized LiLuSiO4:Ce,Tm is four times higher than the TL of BaFBr(I):Eu. After 3 h of storage at room temperature (RT) there is still 94% of initial thermoluminescence and only 48% for BaFBr(I):Eu which demonstrates insignificant thermal fading. The signal can be read out by a blue LED and less efficiently by a red laser. It does require higher stimulation energy than in the case of BaFBr(I):Eu. The self-irradiation with a dose rate of 13 µGy h−1 due to 176Lu isotopes is not a serious drawback for application.

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