Luminescence and excited state dynamics of Bi.sup.3+./sup. centers in Y.sub.2./sub.O.sub.3./sub..

0451486 - FZÚ 2016 RIV NL eng J - Článek v odborném periodiku
Babin, Vladimir - Chernenko, K. - Lipinska, L. - Mihóková, Eva - Nikl, Martin - Schulman, E. - Shalapska, T. - Suchocki, A. - Zazubovich, S. - Zhydachevskii, Ya.
Luminescence and excited state dynamics of Bi³⁺ centers in Y₂O₃.
Journal of Luminescence. Roč. 167, Nov (2015), s. 268-277. ISSN 0022-2313. E-ISSN 1872-7883
Grant ostatní: AVČR(CZ) M100101212
Institucionální podpora: RVO:68378271
Klíčová slova: photoluminescence * time-resolved spectroscopy * excited states * Bi³⁺ centers * Y₂O₃ nanopowders
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 2.693, rok: 2015

Photoluminescence of Y2O3:Bi nanopowder is studied using time-resolved luminescence spectroscopy. Bi3+ ions are substituted for Y3+ ions in two different crystal lattice sites. The luminescence characteristics of these two centers are found to have strongly different electron-phonon interactions. The luminescence of Bi(S6) and Bi(C2) centers peak at 3.04 eV and 2.41 eV, respectively, and arise from the radiative decay of the triplet relaxed excited state (RES) of Bi3+ ions. The model and structure of the RES, responsible for the luminescence of these centers in Y2O3:Bi, as well as radiative and nonradiative processes, taking place in the excited states of these centers, are investigated. The parameters of the triplet RES are determined. Low-temperature quenching of the triplet luminescence of these centers is explained.
Trvalý link: http://hdl.handle.net/11104/0252606