Bi3+ - doped garnets as possible ultraviolet persistent phosphors
Baran M. Kissabekova A. Krasnikov A. Tsiumra V. Vasylechko L. Zazubovich S. Zhydachevskyy Y.
March 2023Elsevier B.V.
Optical Materials
2023#137
Ultraviolet (UV) persistent luminescence (afterglow) and thermally stimulated luminescence observed in the 3.6–4.2 eV energy range are studied for microcrystalline powders of the Bi3+-doped Lu3Ga5O12, Y3Ga5O12, and Ca3Ga2Ge3O12 garnets after their selective UV irradiation at 295 K in the 4–6 eV energy range. Emission and excitation spectra and decay kinetics of the persistent luminescence, as well as the luminescence intensity dependence on the irradiation duration, are measured at 295 K. No UV emission has been observed in the afterglow spectrum of the Gd3Ga5O12:Bi, Lu3Al5O12:Bi, and Y3Al5O12:Bi garnets. The processes resulting in the appearance of the UV persistent luminescence in the investigated Bi3+-doped garnets are discussed. The conditions are formulated which ensure the appearance of this phenomenon in Bi3+-doped compounds and, thus, could inspire the discovery of new effective UV persistent phosphors.
Bi3+ , Charge transfer , Garnets , TSL , UV persistent Luminescence
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Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Wólczyńska 133, Warsaw, 01-919, Poland
Pavlodar Pedagogical University, Mira 60, Pavlodar, 140000, Kazakhstan
Institute of Physics, University of Tartu, W. Ostwaldi 1, Tartu, 50411, Estonia
Institute of Physics, Polish AS, Al. Lotników 32/46, Warsaw, 02-668, Poland
Lviv Polytechnic National University, Bandera 12, Lviv, 79013, Ukraine
Łukasiewicz Research Network - Institute of Microelectronics and Photonics
Pavlodar Pedagogical University
Institute of Physics
Institute of Physics
Lviv Polytechnic National University
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