Origin of luminescence in Bi.sup.3+./sup. - doped lanthanide niobates

0547614 - FZÚ 2022 RIV NL eng J - Článek v odborném periodiku
Baran, M. - Belikov, K.N. - Kissabekova, A. - Krasnikov, A. - Lushchik, A. - Mihóková, Eva - Tsiumra, V. - Vasylechko, L. - Zazubovich, S. - Zhydachevskyy, Ya.
Origin of luminescence in Bi³⁺ - doped lanthanide niobates.
Journal of Alloys and Compounds. Roč. 859, April (2021), č. článku 157800. ISSN 0925-8388. E-ISSN 1873-4669
Grant CEP: GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: photoluminescence * time-resolved spectroscopy * exciton-like states * lanthanide niobates * Bi³⁺
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 6.371, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jallcom.2020.157800

Photoluminescence characteristics of the undoped and Bi3+-doped lanthanide niobates are investigated by the steady-state and time-resolved spectroscopy methods in a wide temperature range of 4.2e500 K. The broad visible emission bands with the large Stokes shifts are found to arise from the triplet relaxed excited states characterized by a small (~1 meV) spin-orbit splitting energy. This indicates the exciton-like origin of all the observed emission bands. The data allow to conclude that the Bi3+-related triplet relaxed excited state is located inside the conduction band. No ultraviolet emission caused by the radiative decay of the triplet relaxed excited state of a Bi3+ ion is observed.
Trvalý link: http://hdl.handle.net/11104/0323909