Abstract
A green long persistent luminescence (LPL) phosphor Ca3Ga4O9:Tb3+/Zn2+ was prepared. Ca3Ga4O9 matrix exhibits blue self-activated LPL due to the creation of intrinsic traps. When Tb3+ is doped, the photoluminescence (PL) and LPL colors change from blue to green with their intensities significantly enhanced. The doping of Zn2+ evidently improves the PL and LPL performances of the Ca3Ga4O9 matrix and Ca3Ga4O9:Tb3+. The thermoluminescence (TL) spectra show that a successive trap distribution is formed by multiple intrinsic traps with different depths in the Ca3Ga4O9 matrix, and the incorporation of Tb3+ and Zn2+ effectively increases the densities of these intrinsic traps. The existence of a successive trap distribution makes the Ca3Ga4O9:Tb3+/Zn2+ phosphor exhibit thermally stable PL and LPL. It is indicated that this phosphor shows great promise for the application such as high-temperature LPL phosphor.
Original language | English |
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Journal | Journal of Rare Earths |
Volume | 36 |
Issue number | 7 |
Pages (from-to) | 675-679 |
Number of pages | 5 |
ISSN | 1002-0721 |
DOIs | |
Publication status | Published - Jul 2018 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018
Keywords
- Long persistent luminescence
- Rare earths
- Self-activated
- Successive trap distribution
- Thermal stability