Intriguing luminescence properties of (Ba, Sr)3Si6O9N4

Eu2+ phosphors via modifying synthesis method and cation substitution

Journal article (2016)

Authors

L.J. Yin ChemE/Product and Process Engineering - AS , University of Electronic Science and Technology of China
Wei Ji University of Science and Technology of China
H.T.J.M. Hintzen RST/Fundamental Aspects of Materials and Energy - AS
Shi Yu Liu University of Electronic Science and Technology of China
Wei Dong He University of Electronic Science and Technology of China
Lin Zhao University of Electronic Science and Technology of China
Xin Xu University of Science and Technology of China
A. Fabre ChemE/Product and Process Engineering - AS
B.F.P.R. Dierre RST/Fundamental Aspects of Materials and Energy - AS
Ming Hsien Lee Tamkang University
J.R. van Ommen ChemE/Product and Process Engineering - AS
Research Group
ChemE/Product and Process Engineering (AS) (TU Delft)
Copyright: © 2016 L.J. Yin, Wei Wei Ji, Shi Yu Liu, Wei Dong He, Lin Zhao, Xin Xu, A. Fabre, B.F.P.R. Dierre, Ming Hsien Lee, J.R. van Ommen, H.T.J.M. Hintzen
DOI: https://doi.org/10.1016/j.jallcom.2016.05.009
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Published Date

03-05-2016

Language

English

Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Product and Process Engineering

Abstract

Synthesizing pure phase Ba3Si6O9N4 by the conventional solid-state reaction method is challenging because of easily formed secondary phase Ba3Si6O12N2 showing similar crystal structure. In this work, an alternative low temperature synthesis method is presented, and a series of green to blue emitting (Ba, Sr)3Si6O9N4: Eu2+ phosphors were prepared by a mechanochemical activation route. Variations in photoluminescence properties and crystal structure, as induced by the change in phosphor composition, were investigated. Under ultraviolet-light excitation, Ba3Si6O9N4: Eu2+ phosphor exhibited a strong narrow green emission at 518 nm and simultaneously a weak emission at 405 nm, which are ascribed to different Eu/Ba sites in Ba3Si6O9N4 lattice proved by Density Functional Theory (DFT) calculations. A continuous green to blue emission in (Ba, Sr)3Si6O9N4: Eu2+ phosphors could be achieved by tuning the crystal structure and local coordination environment acting on Eu2+ with Sr/Ba substitution. More Sr/Ba substitution improved thermal quenching and resulted in a different characteristic of emission peak shift upon increasing the temperature.

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