Инд. авторы:	Yelisseyev A., Isaenko L.I., Korolev V., Stoyanovsky V., Gets V., Naumov D., Ilyina O.
Заглавие:	Optical spectroscopy of Pr3+-doped γ-BiB3O 6 crystals
Библ. ссылка:	Yelisseyev A., Isaenko L.I., Korolev V., Stoyanovsky V., Gets V., Naumov D., Ilyina O. Optical spectroscopy of Pr3+-doped γ-BiB3O 6 crystals // Optical Materials. - 2013. - Vol.36. - Iss. 2. - P.509-515. - ISSN 0925-3467. - EISSN 1873-1252.
Внешние системы:	DOI: 10.1016/j.optmat.2013.10.020; SCOPUS: 2-s2.0-84889102140;
Реферат:	eng: Single crystals of Pr3+-doped γ-BiB3O 6 of optical quality were grown. Band gap is 4.16 eV at 80 K, which differs only slightly from that for undoped samples. Pr concentration is 2 × 1020 cm-3 and the dopant is distributed uniformly along the crystal. Absorption cross-section for Pr3+ was estimated to be ∼1 × 10-20 cm2. At X-ray and UV, band-to-band excitation the Pr:γ-BiB3O6 crystals demonstrate an intense emission in the 450 nm broad band, which is related mainly to recombination of self-trapped excitons (STE). A part of energy is transferred radiatively to Pr3+ ions. The STE emission quenches as temperature increases to 250 K with simultaneous decrease of the decay time from 11 μs to 17 ns. Intensity and decay time of the Pr3+ intracenter luminescence with τ ∼ 50 μs at 450 nm excitation do not depend on temperature. Intensity of thermoluminescence in the 150-400 K range quenches 2 orders at Pr doping, and parameters of the traps were estimated. As a result of relatively narrow band gap in γ-BiB3O6:Pr 3+, there is no cascade luminescence typical of many wide-band-gap matrices. © 2013 Elsevier B.V. All rights reserved.
Ключевые слова:	Decay time; Luminescence; Praseodymium; Absorption cross-section; Bismuth triborate; Decay time; Intense emission; Optical qualities; Optical spectroscopy; Self-trapped exciton; Temperature increase; Absorption; Energy gap; Luminescence; Praseodymium; Single crystals; Doping (additives); Bismuth triborate; Absorption;
Издано:	2013
Физ. характеристика:	с.509-515