Abstract
An overview of some key points in persistent luminescence (PersL) is provided with an emphasis on tunneling phenomena. Notably, key experimental criteria are provided that can substantiate the occurrence of thermal and athermal tunneling and localized transitions. These are elucidated by reference to a Case Study and to some other relevant works. Many experimental studies of PersL have assigned the mechanism to be tunneling on the basis of the linear relationship of PersL decay between intensity, I, and time, t−k, where k is a constant, or I−1 versus t. However, this relation also applies to the case where there is a uniform distribution of trap levels, which may be evident from the breadth of the TL peak. The key measurement for the assignment of below-conduction band processes is the absence of thermal conductivity. © 2025 The Author(s). Advanced Optical Materials published by Wiley-VCH GmbH.
| Original language | English |
|---|---|
| Article number | 2500793 |
| Number of pages | 10 |
| Journal | Advanced Optical Materials |
| Volume | 13 |
| Issue number | 21 |
| Online published | 14 Jun 2025 |
| DOIs | |
| Publication status | Published - 25 Jul 2025 |
| Externally published | Yes |
Funding
K.-L.W. acknowledges financial assistance from the Hong Kong Research Grants Council No. 12300021 and NSFC/RGC Joint Research Scheme (N_PolyU209/21). The authors are indebted to Dr. Waygen Thor for reading the manuscript and providing comments.
Research Keywords
- afterglow
- fading
- localized transition
- persistent luminescence
- thermoluminescence
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
RGC Funding Information
- RGC-funded
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