Luminescence and energy transfer processes in LuNbO4:Bi, Eu


Baran M. Belikov K.N. Kissabekova A. Krasnikov A. Lushchik A. Suchocki A. Tsiumra V. Vasylechko L. Zazubovich S. Zhydachevskyy Y.
January 2022Elsevier B.V.

Optical Materials
2022#123

Microcrystalline powders of LuNbO4:Bi3+, Eu3+ with the same nominal Bi3+ concentration (2 at.%) and different nominal Eu3+ concentrations (varying from 0 to 8 at.%) are synthesized and analyzed by the X-ray diffraction method. Photoluminescence characteristics of the co-doped LuNbO4:Bi, Eu powders are investigated by the steady-state and time-resolved luminescence spectroscopy methods in a wide temperature range (4.2–500 K) and compared with those of the undoped and bismuth-doped LuNbO4. It is found that owing to the overlap of the intrinsic and Bi3+-related emission bands with the absorption bands of Eu3+, an effective non-radiative (resonance) energy transfer from both the host and the Bi3+-related exciton-like states to Eu3+ ions, resulting in the appearance of the luminescence in the 1.6–3.8 eV energy range, takes place in LuNbO4:Bi, Eu. The exchange interaction is found to be responsible for the energy transfer process. The possible application of LuNbO4:Bi, Eu in white light-emitting diodes is discussed.

Bi3+ , Eu3+ , Luminescence , Lutetium niobate , Non-radiative energy transfer , XRD

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Institute of Electronic Materials Technology, Wólczyńska 133, Warsaw, 01-919, Poland
Institute for Single Crystals, 60 Nauka Avenue, Kharkiv, 61001, Ukraine
Institute of Physics, University of Tartu, W. Ostwaldi 1, Tartu, 50411, Estonia
Pavlodar State Pedagogical University, Mira 60, Pavlodar, 140000, Kazakhstan
Institute of Physics, Polish AS, Al. Lotników 32/46, Warsaw, 02-668, Poland
Ivan Franko National University of Lviv, Kyryla and Mefodiya 8a, Lviv, 79005, Ukraine
Lviv Polytechnic National University, Bandera 12, Lviv, 79013, Ukraine

Institute of Electronic Materials Technology
Institute for Single Crystals
Institute of Physics
Pavlodar State Pedagogical University
Institute of Physics
Ivan Franko National University of Lviv
Lviv Polytechnic National University

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