Issue 9, 2018

Control of the photoluminescence in Ba0.97Y2Si3O10:Eu2+ phosphors via the intensification effect of the second luminescence centre

Abstract

Cation substitution has been proven to be a prevailing strategy for efficiently tuning the luminescence properties of divalent europium (Eu2+). In this work, the isostructural Ba0.97Y2−xLuxSi3O10:0.03Eu2+ (BYSO:Eu,xLu) and Ba0.97Y2−yGdySi3O10:0.03Eu2+ (BYSO:Eu,yGd) (x/y = 0.00–2.00) solid solutions with two emission bands were designed based on the existence of a second potential luminescence center in the Ba0.97Y2Si3O10:0.03Eu2+via the conventional solid-state reaction. Combined with the variation of distortion and disorder, a new model named the intensification effect of the second luminescence center was built in view of the local and average structures. All the samples exhibit a series of asymmetric and broad-band emissions covering the blue and cyan or blue and green regions, due to the increased Eu2+ amounts in the second coordination zone, which is attributed to the increase in distortion and disorder by varying the Gd3+ or Lu3+ content. Moreover, the thermal properties of BYSO:Eu,yGd are superior to the commercial BaMgAl10O17:Eu2+, with T1/2 over 523 K and small reductions in emission intensity at 423 K. The present research aims to shed new light on the improvement of phosphor properties with broad-band emission and high luminous efficacy.

Graphical abstract: Control of the photoluminescence in Ba0.97Y2Si3O10:Eu2+ phosphors via the intensification effect of the second luminescence centre

Supplementary files

Article information

Article type
Research Article
Submitted
18 Apr 2018
Accepted
26 Jun 2018
First published
26 Jun 2018

Inorg. Chem. Front., 2018,5, 2111-2122

Control of the photoluminescence in Ba0.97Y2Si3O10:Eu2+ phosphors via the intensification effect of the second luminescence centre

H. Li, Y. Liang, Y. Zhu, S. Liu, J. Chen, W. Lei and M. Wang, Inorg. Chem. Front., 2018, 5, 2111 DOI: 10.1039/C8QI00364E

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