Abstract

The emission band of Sr2Si5N8:Eu2+ phosphors consists of two peaks originating from two different crystallographic sites for Eu2+ activators in the Sr2Si5N8 structure. The two-peak emission behavior is closely related to the energy transfer between activators at those sites. A rate-equation model involving the crystallographic information of the host was used to quantify the time-resolved photoluminescence spectra and to systematically analyze the energy transfer behavior.

© 2009 Optical Society of America

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