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Abstract
Thermoluminescence (TL) and radioluminescence (RL) spectra of the long-lasting phosphorescence of SrA12O4:Eu2+,Dy3+ with A1N addition and commercially used SrA12O4:Eu2+,Dy3+ were compared. Their spectra were slowly recorded over the temperature range from 25 to 673 K (400 °C). A1N offers a higher temperature TL peak, which should lengthen the phosphor lifetime. However, both TL and RL, especially that below room temperature, reveal that there are additional decay paths for the samples of SrA12O4:Eu2+,Dy3+ with A1N additions. These new defect sites reduce the phosphor efficiency. Some speculative models of potential sites are proposed and discussed. In addition, discontinuous intensity changes have been observed for both sample types in TL and RL spectra, which are assigned to the transitions of embedded impurity phases. The justification for this model is explained. Suggestions for future experimentation are also considered.
Original language | English |
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Pages (from-to) | 1403-1412 |
Number of pages | 10 |
Journal | Journal of Materials Research |
Volume | 31 |
Issue number | 10 |
Early online date | 26 May 2016 |
DOIs | |
Publication status | Published - 28 May 2016 |
Keywords
- Defects
- Dopant
- Luminescence
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Dive into the research topics of 'Competing roles of defects in SrAl2O4:Eu2+,Dy3+ phosphors detected by luminescence techniques'. Together they form a unique fingerprint.Projects
- 1 Finished
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Accurate Luminescence Dating: Accurate Luminescence Dating: Developing Combined Spectral - and Time-Resolved OSL
Finch, A. A. (PI) & Robinson, R. A. J. (CoI)
10/11/09 → 9/02/12
Project: Standard