The role of Er.sup.3+./sup. content in the luminescence properties of Y.sub.3./sub.Al.sub.5./sub.O.sub.12./sub. single crystals: incorporation into the lattice and defect state creation

0572143 - FZÚ 2024 RIV CH eng J - Journal Article
Buryi, Maksym - Gaston-Bellegarde, Amayes Medhi - Pejchal, Jan - Levchenko, Fedor - Remeš, Zdeněk - Ridzoňová, Katarína - Babin, Vladimir - Chertopalov, Sergii
The role of Er³⁺ content in the luminescence properties of Y₃Al₅O₁₂ single crystals: incorporation into the lattice and defect state creation.
Crystals. Roč. 13, č. 4 (2023), č. článku 562. ISSN 2073-4352. E-ISSN 2073-4352
Institutional support: RVO:68378271
Keywords : yttrium aluminum garnet * erbium doping * epr * luminescence * kinetics
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.7, year: 2022
Method of publishing: Open access

Erbium-doped Y3Al5O12 (YAG) single crystals grown using the micro-pulling-down technique were investigated. Three Er concentrations were chosen: 0.1, 0.3 and 1 at%. Er3+ electron paramagnetic resonance (EPR) spectra were measured in the ground and first excited states. The corresponding g tensors and 167Er hyperfine interaction were changing upon Er content indicating moderation of the Er-O bond length and/or Er local surrounding. Photoluminescence (PL) and radioluminescence (RL) spectra were complex, consisting of strongly overlapped typical Er3+ transitions. In addition, there were other broad PL band (3.1 eV) and RL band (3.95 eV) attributed to the F+ center and yttrium substituting for aluminum (YAl), respectively. The X-ray excited decay kinetics exhibited a decrease of the decay time of the YAl from hundreds of nanoseconds to nanoseconds upon Er doping level. This is discussed and explained considering EPR data.
Permanent Link: https://hdl.handle.net/11104/0346906