Mind the Bump: Thermal Quenching Correction of Thermoluminescence Glow Curves and Application to SrAl2O4:Eu2+, Dy3+
- 1Department of Chemistry The Hong Kong Polytechnic University Hong Kong S. A. R. China
- 2Department of Chemistry City University of Hong Kong Hong Kong S. A. R. China
Abstract
In order to extract accurate information from a thermoluminescence glow curve it is necessary to correct it for thermal quenching. Assuming that the dominant quenching process is due to nonradiative deactivation, the correction can be made by the Mott–Seitz equation. However, the experimentally determined quenching curve from the temperature dependence of luminescence intensity or integrated band area often suffers from a pronounced “bump” which we associate with thermoluminescence. It is shown that good data fits can be achieved by employing the higher temperature region above thermoluminescence. For demonstration, the commercial persistent luminescence phosphor SrAl2O4:Eu2+, Dy3+ has been chosen. The thermal quenching parameter WTQ was found to be 5016 ± 121 cm−1 and the quenching mechanism was deduced to be ionization to the conduction band. The corrected glow curves have been analyzed by the Kitis and initial rise methods and indicate a continuous distribution of traps at ~4000–5000 cm−1 below the conduction band. These are normally taken to be oxygen vacancies together with the cooperation of dysprosium ions.
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BibTeX
@article{kai2026mind,
title = {{Mind the Bump: Thermal Quenching Correction of Thermoluminescence Glow Curves and Application to SrAl2O4:Eu2+, Dy3+}},
author = {Hei‐Yui Kai and Ka‐Leung Wong and Peter A. Tanner},
journal = {Advanced Photonics Research},
year = {2026},
month = oct,
doi = {10.1002/adpr.70294},
url = {https://doi.org/10.1002/adpr.70294},
note = {CC BY},
}
RIS
TY - JOUR
TI - Mind the Bump: Thermal Quenching Correction of Thermoluminescence Glow Curves and Application to SrAl2O4:Eu2+, Dy3+
AU - Hei‐Yui Kai
AU - Ka‐Leung Wong
AU - Peter A. Tanner
PY - 2026
DA - 2026/10/25
JO - Advanced Photonics Research
DO - 10.1002/adpr.70294
UR - https://doi.org/10.1002/adpr.70294
AB - In order to extract accurate information from a thermoluminescence glow curve it is necessary to correct it for thermal quenching. Assuming that the dominant quenching process is due to nonradiative deactivation, the correction can be made by the Mott–Seitz equation. However, the experimentally determined quenching curve from the temperature dependence of luminescence intensity or integrated band area often suffers from a pronounced “bump” which we associate with thermoluminescence. It is shown that good data fits can be achieved by employing the higher temperature region above thermoluminescence. For demonstration, the commercial persistent luminescence phosphor SrAl2O4:Eu2+, Dy3+ has been chosen. The thermal quenching parameter WTQ was found to be 5016 ± 121 cm−1 and the quenching mechanism was deduced to be ionization to the conduction band. The corrected glow curves have been analyzed by the Kitis and initial rise methods and indicate a continuous distribution of traps at ~4000–5000 cm−1 below the conduction band. These are normally taken to be oxygen vacancies together with the cooperation of dysprosium ions.
SN - 2699-9293
ER -