Visualization of trap distribution in SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup> revealed by simulations of luminescence changes in charging and emission of persistent luminescence and thermoluminescence based on a random walk mode
A stochastic analysis of the change in persistent luminescence (PersL) of Sr<sub>0.9</sub>Al<sub>2</sub>O<sub>4</sub>:Eu<sub>0.01<i>x</i></sub><sup>2+</sup>,Dy<sub>(0.1-0.01<i>x</i>)</sub><sup>3+</sup> (SAOED<sub><i>x</i></sub>, <i>x</i> = 2, 4, 5, 6, 8, and 10) based on a one-dimensional random walk model (1D RWM) is presented. In the RWM, the excited electron is treated as a particle and can hop stochastically between reservoirs aligned in a straight line. Simulations of changes in PersL and the charging process are performed to determine the hopping probabilities and the electron distributions in reservoirs. We predict potential energies of the electron reservoirs through simulations of the thermoluminescence (TL) spectra of SAOED<sub><i>x</i></sub> and present potential energy diagrams of the luminescence center and traps involved in PersL.
Authors
- Kazuteru Shinozaki (ORCID: https://orcid.org/0000-0001-7571-9210)
- Shingo Hattori (ORCID: https://orcid.org/0000-0002-9385-961X)
- Shigeki Yamada (ORCID: https://orcid.org/0000-0002-3891-1323)
- Ryuta KOIZUMI
- Ryoya Takahashi (ORCID: https://orcid.org/0000-0002-7760-2005)
Institutions
- Yokohama City University (JP)
Publication Details
- Journal
- Physical Chemistry Chemical Physics
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5cp01232e
- Primary Topic
- Luminescence Properties of Advanced Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00