Temperature-dependent luminescence of europium-doped Ga₂O₃ ceramics
Kumarbekov K.K. Kakimov A.B. Karipbayev Z.T. Kassymzhanov M.T. Brik M.G. Ma C.-G. Piasecki M. Suchikova Y. Kemere M. Konuhova M.
February 2025Elsevier B.V.
Optical Materials: X
2025#25
This study explores the synthesis and luminescent properties of europium-doped gallium oxide (Ga₂O₃:Eu) ceramics fabricated via electron beam-assisted synthesis (EBAS) at 1.4 MeV. The resulting Ga₂O₃:Eu ceramics exhibit a nanocrystalline structure with an average crystallite size of ∼30 nm, high crystallinity, and minimal lattice strain (<0.5 %). Luminescence analysis from 4 K to 300 K reveals both intrinsic and europium-induced emissions. While intrinsic Ga₂O₃ emission exhibits thermal quenching above 100 K, Eu³⁺-related emissions, notably the 611 nm red emission, show thermal stability, retaining ∼90 % of their intensity at 300 K. Additionally, a novel low-temperature emission peak at 1.74 eV, potentially associated with electron beam-induced defects, was detected, meriting further exploration. These findings indicate that Ga₂O₃:Eu ceramics synthesized via EBAS hold promise for optoelectronic, radiation detection, and high-temperature applications, given their rapid production and enhanced thermal stability.
Electron beam-assisted synthesis , Ga₂O₃:Eu , Luminescence , Сeramics
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Institute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
Institute of Physics, University of Tartu, Tartu, 50411, Estonia
Department of Theoretical Physics, Jan Dlugosz University, Czestochowa, Poland
Academy of Romanian Scientists, Bucharest, 050044, Romania
School of Optoelectronic Engineering &CQUPT-BUL Innovation Institute, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China
The Department of Physics and Methods of Teaching Physics, Berdyansk State Pedagogical University, Berdyansk, 71100, Ukraine
Institute of Solid State Physics, University of Latvia, 8 Kengaraga, Riga, LV-1063, Latvia
Institute of Physical and Technical Sciences
Centre of Excellence for Photoconversion
Institute of Physics
Department of Theoretical Physics
Academy of Romanian Scientists
School of Optoelectronic Engineering &CQUPT-BUL Innovation Institute
The Department of Physics and Methods of Teaching Physics
Institute of Solid State Physics
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