Towards deliberate design of persistent phosphors: a study of La–Ga admixing in LuAG:Ce crystals to engineer elemental homogeneity and carrier trap depths

0573531 - FZÚ 2024 RIV GB eng J - Journal Article
Bartosiewicz, K. - Fritz, V. - Van der Heggen, D. - Szymanski, D. - Zeler, J. - Pejchal, Jan - Yamaji, A. - Kučerková, Romana - Beitlerová, Alena - Kurosawa, S. - Yoshikawa, A. - Smet, P.F. - Zych, E. - Nikl, Martin
Towards deliberate design of persistent phosphors: a study of La–Ga admixing in LuAG:Ce crystals to engineer elemental homogeneity and carrier trap depths.
Journal of Materials Chemistry C. Roč. 11, č. 26 (2023), s. 8850-8865. ISSN 2050-7526. E-ISSN 2050-7534
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA21-17731S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : Lu₃Al₂Ga₃O₁₂:Ce * thermoluminescence * persistent luminescence * La³⁺ codoping * micro-pulling down method
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.4, year: 2022
Method of publishing: Limited access
https://doi.org/10.1039/d3tc01304a

This research investigated the crystal chemical principles related to the incorporation of incompatible atoms into a garnet host lattice. These considerations might be used to guide and drive the design of new garnet compounds with novel properties. The strongly incompatible La atoms at the Lu sites of the Lu3Al2Ga3O12:Ce host lattice served as a research model. This study showed the possibility of designing material properties by exploiting atom mismatches in a crystal lattice. Lu3Al2Ga3O12:Ce0.075% crystals with increasing concentrations of La3+ ions were grown from the melt using the micro-pulling down method. The concentration of La3+ ions above 0.300 at% imposed physical and chemical boundary conditions on the crystallization process. The radial distributions of the chemical elements were studied as a function of the concentration of La3+ ions. It was revealed that La3+ codoping significantly reduced the cross-sectional fluctuation of the Ga and Al atoms.
Permanent Link: https://hdl.handle.net/11104/0343965