Peculiarities and the red shift of Eu.sup.2+ ./sup.luminescence in Gd.sup.3+./sup.-admixed YAG phosphors

0545154 - FZÚ 2022 RIV NL eng J - Journal Article
Jarý, Vítězslav - Havlák, Lubomír - Buryi, Maksym - Mihóková, Eva - Babin, Vladimir - Bárta, Jan - Vaněček, Vojtěch - Remeš, Zdeněk - Nikl, Martin
Peculiarities and the red shift of Eu²⁺ luminescence in Gd³⁺-admixed YAG phosphors.
Optical Materials. Roč. 120, Oct (2021), č. článku 111464. ISSN 0925-3467. E-ISSN 1873-1252
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : photoluminescence * Eu²⁺ emission * (Gd,Y)₃Al₅O₁₂ * white LED phosphors
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.754, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.optmat.2021.111464

Set of Eu2+-doped (Gd,Y)3Al5O12 (GYAG) powder samples with different Gd/Y ratio was synthesized by inor-ganic reaction in the solid state from high purity Gd2O3, Y2O3, Al2O3 and EuS. Their structural, scintillation and optical properties were investigated thoroughly by means of X-ray powder diffraction, time-resolved lumines-cence spectroscopy, photothermal deflection spectroscopy and electron paramagnetic resonance in a broad temperature range to assess the influence of Gd admixture into the YAG host. A phenomenological model was fitted to the measured temperature dependences of the photoluminescence emission spectra and photo-luminescence decay times to better understand the dynamics of the 5d excited state of the Eu2+center. Ther-moluminescence and delayed recombination measurements were performed to study the trap distribution and thermally induced ionization of the activator’s excited state.
Permanent Link: http://hdl.handle.net/11104/0321914