Anatoli Popov » Публикация

Поделиться публикацией:
Опубликовать в блог:
Опубликовано 2011-08-27 Опубликовано на SciPeople2011-08-27 11:18:23 ЖурналOptical Materials, Vol.33, 2011, pp. 1102-1105

Luminescence of nano- and macrosized LaPO4:Ce,Tb excited by synchrotron radiation
V. Pankratov, A.I. Popov, A. Kotlov, C. Feldmann / Anatoli Popov
Optical Materials, Vol.33, 2011, pp. 1102-1105
Аннотация Comparing the luminescence properties of nanosized and macroscopic LaPO4:Ce,Tb powders are performed in wide spectral range using synchrotron radiation. In the present study, LaPO4:Ce,Tb nanopowder was produced by means of a microwave-induced synthesis in ionic liquids, whereas the bulk sample represents a commercial lamp phosphor. Emission and excitation of both, Ce3+ and Tb3+ luminescence, is observed to be different when comparing bulk and nanosized LaPO4:Ce,Tb. In particular, it was shown that the fine structure of the Ce3+ as well as the Tb3+ related emission is poorly resolved for the nanomaterial. It is suggested that the nanoparticles surface plays a key role regarding the perturbation of rare-earth ions and changes their luminescence properties. Furthermore, it is demonstrated that allowed f–d transitions on Tb3+ at high energy are significantly suppressed for nanosized LaPO4:Ce,Tb. Energy transfer is required to initiate Tb3+ emission even in the vacuum ultraviolet spectral range.
Ключевые слова публикации:


Вам необходимо зайти или зарегистрироваться для комментирования
Этот комментарий был удален
Этот комментарий был удален
Этот комментарий был удален