Effects of Sc.sup.3+./sup. admixture on luminescence and scintillation properties of Ce.sup.3+./sup.-doped Lu.sub.2./sub.Y(Al.sub.5-x./sub.Sc.sub.x./sub.)O.sub.12./sub. (x = 1, 1.5, 2) garnet single-crystalline films

0576151 - FZÚ 2024 RIV NL eng J - Journal Article
Chewpraditkul, Wa. - Wantong, K. - Chewpraditkul, W. - Pattanaboonmee, N. - Kučerková, Romana - Beitlerová, Alena - Nikl, Martin - Strachotová, D. - Kučera, M.
Effects of Sc³⁺ admixture on luminescence and scintillation properties of Ce³⁺-doped Lu₂Y(Al_5-xSc_x)O₁₂ (x = 1, 1.5, 2) garnet single-crystalline films.
Optical Materials. Roč. 145, Nov (2023), č. článku 114417. ISSN 0925-3467. E-ISSN 1873-1252
R&D Projects: GA ČR(CZ) GA21-17731S; 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 : Lu₂Y(Al,Sc)₅O₁₂:Ce * liquid phase epitaxy * luminescence * scintillation * single-crystalline films
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.9, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.optmat.2023.114417

Effects of Sc3+ admixture on luminescence and scintillation properties were studied in Ce3+ - doped Lu2Y(Al5-xScx)O12 (x = 1, 1.5, 2) garnet single-crystalline films grown by the isothermal liquid phase epitaxy technique. The Ce3+ photoluminescence (PL) was slightly blue shifted with increasing Sc content due to a decrease in crystal field splitting of the Ce3+ 5d levels. In addition, the thermal activation energy of PL quenching, estimated from the temperature dependence of PL decay times, decreased with increasing Sc content. Lu2YAl4ScO12:Ce exhibited the highest light yield (LY) value of 420 photons/MeV at 5.5 MeV α particles along with a fast scintillation decay time constant (τe) of 17.4 ns. At room temperature, the decrease of LY value with increasing Sc content could be attributed to the thermal ionization process.
Permanent Link: https://hdl.handle.net/11104/0345739