Инд. авторы:	Yelisseyev A.P., Isaenko L.I., Starikova M.K.
Заглавие:	Optical study of defects in lithium iodate α-LiIO3
Библ. ссылка:	Yelisseyev A.P., Isaenko L.I., Starikova M.K. Optical study of defects in lithium iodate α-LiIO3 // Journal of the Optical Society of America B: Optical Physics. - 2012. - Vol.29. - Iss. 6. - P.1430-1435. - ISSN 0740-3224. - EISSN 1520-8540.
Внешние системы:	DOI: 10.1364/JOSAB.29.001430; SCOPUS: 2-s2.0-84861803974;
Реферат:	eng: Photoluminescence (PL) in two broad bands at 2.95 and 2.6 eV in lithium iodate α-LiIO3 is associated with selftrapped excitons and native point defects (supposedly oxygen vacancies), respectively, based on the luminescence excitation spectra and the PL temperature dependence. Free charge carriers may be captured by two types of shallow traps with thermal activation energies of 0.14 and 0.21 eV: they are responsible for crystal darkening at temperatures below 200 K. Spontaneous emission of α-LiIO3 during cooling or heating at temperatures T < 200 K is pyroluminescence, which occurs at dielectric breakdown in strong pyroelectric fields on the crystal surface and in its bulk as well as inside the channel defects. © 2012 Optical Society of America.
Ключевые слова:	Thermal activation energies; Temperature dependence; Shallow traps; Self-trapped exciton; Pyroelectric fields; Optical study; Luminescence excitation spectra; Surface defects; Crystal surfaces; Channel defects; Broad bands; Point defects; Lithium; Activation energy; Free charge carriers;
Издано:	2012
Физ. характеристика:	с.1430-1435