Fizika Nizkikh Temperatur: Volume 43, Number 8 (August 2017), p. 1252-1256    ( to contents , go back )

Processes of excitation energy transport in EuPO4 and EuP3O9 nanocrystals

N.V. Kononets, V.V. Seminko, P.O. Maksimchuk, A.V. Aslanov, I.I. Bespalova, A.A. Masalov, and Yu.V. Malyukin

Institute for Scintillation Materials, National Academy of Sciences of Ukraine 60 Nauky Ave., Kharkiv 61072, Ukraine
E-mail: seminko@isma.kharkov.ua

Received March 16, 2017

Abstract

Processes of excitation energy transport were investigated for EuPO4 and EuP3O9 nanocrystals, in which Eu3+ ions form three- and one-dimensional subsystems, respectively. It was determined that for EuPO4 nanocrystals 5D0 luminescence quenching manifested itself even at low temperatures due to effective phonon-assisted energy migration. At the same time, for EuP3O9 nanocrystals no influence of energy migration on the luminescence quenching was observed in the whole temperature range from 10 to 293 K that can be ascribed to modification of phonon spectra for EuP3O9 nanocrystals as compared to their bulk counterparts.

PACS: 78.55.–m Photoluminescence, properties and materials.

Key words: energy transfer, phosphates, luminescence, nanocrystals

Published online: June 26, 2017

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ISSN: 0132-6414 (Print) | ISSN: 1816-0328 (Online)