Инд. авторы:	Yelisseyev A.P., Starikova M.K., Korolev V.V., Isaenko L.I., Lobanov S.I.
Заглавие:	Photoluminescence of lithium thiogallate LiGaS2
Библ. ссылка:	Yelisseyev A.P., Starikova M.K., Korolev V.V., Isaenko L.I., Lobanov S.I. Photoluminescence of lithium thiogallate LiGaS2 // Journal of the Optical Society of America B: Optical Physics. - 2012. - Vol.29. - Iss. 5. - P.1003-1011. - ISSN 0740-3224. - EISSN 1520-8540.
Внешние системы:	DOI: 10.1364/JOSAB.29.001003; SCOPUS: 2-s2.0-84861359051;
Реферат:	eng: Annealing in appropriate atmosphere affects considerably transparency and photoluminescence (PL) of lithium thiogallate LiGaS2 (LGS). Intense absorption at 8.0 μm after annealing in vapors of Ga2S3 or S is related to S-S vibrations. Annealing in vacuum produces intense blue PL in a 2.74 band, which transforms further to a 2.98 eV band: both emissions are excited in the same 3.4 eV band and are associated with two types of crystallographically nonequivalent anion vacancies (F-centers). The 2.98 eV emission of a more stable F-center decays exponentially with decay times τ= 19 μs and 218 ns at 80 and 300 K, respectively, and quenches to 650 K. PL in a 2.0 eV band, excited near the fundamental absorption edge, with a large Stokes shift and fast temperature quenching is related to recombination of the self-trapped excitons. LGS with F-centers can be used as a light-emitting medium in different laser and optoelectronic devices. © 2012 Optical Society of America.
Ключевые слова:	Thiogallate; Temperature quenching; Stokes shift; Self-trapped exciton; Intense blue; Fundamental absorption edge; Photoluminescence; Decay time; Annealing in vacuum; Anion vacancy; Optoelectronic devices; Lithium; Annealing; F-centers;
Издано:	2012
Физ. характеристика:	с.1003-1011