Site selective spectroscopic study of an efficient red-emitting phosphor Y2MoO6:Eu

摘要

Y2MoO6:Eu, an efficient red-emitting phosphor for white light emitting diodes, was synthesized by the sol gel method and investigated by site selective spectroscopy under the selective excitation of a tunable laser. Three kinds of sites occupied by Eu3+ ions were confirmed by low temperature emission and excitation spectra in this compound. Lifetime measurements were carried out to identify the emission peaks of Eu3+ in each site. The correlation between the site structure and luminescent property of Eu3+ were clarified by using selection rules. And energy transfer between different sites was observed and discussed. (C) 2015 Elsevier B.V. All rights reserved.