Crystal structure tailoring and luminescence tuning of Sr1-xBaxAl2Si2O8:Eu2+ phosphors for white-light-emitting diodes
Crystal structure tailoring and luminescence tuning of Sr1-xBaxAl2Si2O8:Eu2+ phosphors for white-light-emitting diodes
复制标题
用于白光发光二极管的 Sr1-xBaxAl2Si2O8:Eu2 荧光粉的晶体结构定制和发光调谐
DOI：
10.1016/j.jallcom.2018.10.347
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发表时间：
2019-03-05
影响因子：
6.2
通讯作者：
Fang, Minghao
中科院分区：
文献类型：
--
作者：
Wang, Baochen;Wang, Ziyao;Fang, Minghao
晶体结构定制是用于调节磷光体的发光的常用方法。本文主要研究了Ba取代Sr离子对Sr_（1-x）Al_2Si_2 O_8：Eu ~（2+）荧光粉发光光谱的影响。用X射线粉末衍射法表征了相组成，用Rietveld精修法测定了晶体结构。对激发光谱、发射光谱、漫反射光谱和热猝灭进行了研究。结果表明：Sr 1-xAl 2Si 2 O 8：Eu（2+）在0 ~ 0.75范围内可形成一系列连续的固溶体。随着x值的增加，发射光谱在415 ~ 450 nm范围内出现明显的红移。发射红移在使Sr_（1-x）Al_2Si_2 O_8：Eu ~（2+）能够用作白光发光二极管的标准蓝色荧光粉中起重要作用。(C)2018 Elsevier B. V.版权所有。
Crystal structure tailoring is a commonly used method for tuning the luminescence of phosphors. This study mainly aims at luminescent spectra tuning of Sr1-xBaxAl2Si2O8:Eu2+ phosphors by substitution of Ba for Sr ions. The phase composition was characterized by X-ray powder diffraction and the crystal structure was determined by using the Rietveld refinement method. The excitation and emission spectra, diffuse reflectance spectra, and thermal quenching were also investigated in detail. The results show that Sr1-xBaxAl2Si2O8:Eu(2+)phosphors can form a series of continuous solid solutions in the range from 0 to 0.75. With the increase in x value, the emission spectra show an obvious redshift from 415 to 450 nm. The emission redshift plays an important role in enabling Sr1-xBaxAl2Si2O8:Eu2+ to be used as a standard blue phosphor for application in white-light-emitting diodes.(C) 2018 Elsevier B.V. All rights reserved.