Journal Article

PUBDB-2025-01592

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Temperature-dependent luminescence of europium-doped Ga$_2$O$_3$ ceramics

Kumarbekov, K. K.Extern* ; Kakimov, A. B. (Corresponding author)Extern* ; Karipbayev, Z. (Corresponding author)Extern* ; Kassymzhanov, M. T. ; Brik, M. G. ; Ma, C.-g. ; Piasecki, M. ; Suchikova, Y. ; Kemere, M.Extern* ; Konuhova, M.Extern*

2025
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.omx.2024.100392  doi:10.3204/PUBDB-2025-01592

Abstract: This study explores the synthesis and luminescent properties of europium-doped gallium oxide (Ga$_2$O$_3$:Eu) ceramics fabricated via electron beam-assisted synthesis (EBAS) at 1.4 MeV. The resulting Ga$_2$O$_3$:Eu ceramicsexhibit 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 Ga$_2$O$_3$ emission exhibits thermal quenching above 100 K, Eu$^{3+}$-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 Ga$_2$O$_3$:Eu ceramics synthesized via EBAS hold promise for optoelectronic, radiation detection, and high-temperature applications, given their rapid production and enhanced thermal stability.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20231138 (I-20231138) (I-20231138)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; ; ; Article Processing Charges ; DOAJ Seal ; Fees ; Mirror Journal ; SCOPUS

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