_红色荧光粉的制备

硅酸盐学报

・ 342 ・2013年

DOI：10.7521/j.issn.0454–5648.2013.03.11 M1.95P2O7:0.05Eu3+(M=Ba, Sr, Ca)红色荧光粉的制备及其发光性能

昉

鄢蜜1，薛丽红2，严有为2

(1. 中国电力科学研究院，电力自动化研究所，南京 210003；2. 华中科技大学，模具技术国家重点实验室，武汉 430074)

摘要：以尿素为燃料，采用溶液燃烧法合成出M2P2O7:Eu3+ (M=Ba, Sr, Ca)红色荧光粉。利用X射线衍射和荧光光谱研究了激活剂Eu3+对3种荧光粉晶体结构和发光性能的影响。结果表明，制得样品分别为纯相的六方晶系Ba2P2O7、正交晶系Sr2P2O7和四方晶系Ca2P2O7。光谱分析表明，M2P2O7:Eu3+ (M=Ba, Sr, Ca)的激发峰位置和发射峰位置均基本相同。M1.95P2O7:0.05Eu3+ (M=Ba, Ca)发射红光，其对应于5D0→7F2电偶极跃迁的612nm发射峰强度高于对应于5D0→7F1磁偶极跃迁的588nm和593nm发射峰，说明Eu3+在M2P2O7 (M=Ba, Ca)基质中处于非对称格位；而Sr1.95P2O7:0.05Eu3+发射橙红光，Eu3+在Sr2P2O7基质中处于对称格位。在394nm激发下，M1.95P2O7:0.05Eu3+ (M=Ba, Sr, Ca)的色度坐标分别为(0.35，0.21)、(0.24，0.15)、(0.35，0.21)。这3种荧光粉均能被394nm紫外光和464nm蓝光有效激发，发射红光或橙红光。

关键词：溶液燃烧法；焦磷酸盐；铕掺杂；红色荧光粉

中图分类号：O614 文献标志码：A 文章编号：0454–5648(2013)03–0342–05

网络出版时间：网络出版地址：

Preparation and Luminescence Properties of M1.95P2O7:0.05Eu3+ (M=Ba, Sr, Ca)

Red Emitting Phosphors

YAN Mifang1，XUE Lihong2，YAN Youwei2

(1. Power Automation Department, China Electric Power Research Institute, Nanjing 210003, China; 2. State Key Laboratory of

Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract: Red phosphors M1.95P2O7:0.05Eu3+ (M=Ba, Sr, Ca) were synthesized with urea as a fuel by a combustion-assisted method. The phase composition and luminescence properties were investigated by X-ray diffraction and fluorescence spectroscopy, respec-tively. The result shows that the samples prepared appear pure hexagonal Ba2P2O7, orthorhombic Sr2P2O7 and tetragonal Ca2P2O7, respectively. The excitation and emission peaks of the M1.95P2O7:0.05Eu3+ (M=Ba, Sr, Ca) phosphors were located at the same points. The M1.95P2O7:0.05Eu3+ (M=Ba, Ca) emitted mainly a red light, and the intensity of the emission peaks located at 612nm due to

5D

→7F2 electric-dipole transition of Eu3+ was greater than that located at 588and 593nm due to 5D0→7F2 electric-dipole transition. It indicated that Eu3+ lied in non-centrosysmetrical sites. On the contrary, the Sr1.95P2O7:0.05Eu3+ phosphor emitted mainly an or-ange-red light, and Eu3+ lied in centrosymmetry sites, The CIE chromaticity diagram coordinate of M1.95P2O7:0.05Eu3+ (M=Ba, Sr, Ca) phosphors were calculated as (0.35, 0.21), (0.24, 0.15) and (0.35, 0.21), respectively. All the three phosphors could be excited by a near UV light at 394nm and a blue light at 464nm, emitting a red or an orange-red light.

Key words: combustion method; pyrophosphate; europium doped; red emitting phosphor

白光发光二极管(white light emitting diode，WLED)具有节能、环保、高效和寿命长等优点，被誉为21世纪的绿色光源。荧光粉的研究和开发是制备高质量白光LED的基础。其中，红色荧光粉由于发光效率低、稳定性差，难以满足三基色荧光粉的要求，因此白光LED用红色荧光材料的研究与新体系探索已成为发光材料领域的前沿课题。

磷酸盐是一类十分稳定的化合物，可用作稀土

收稿日期：2012–09–02。修订日期：2012–10–24。

基金项目：国家自然科学基金(51002054)；中央高校基本科研业务费资助(HUST：2011TS014)。

第一作者：鄢蜜昉(1987—)，女，硕士，工程师。

通信作者：薛丽红(1975—)，女，博士，副教授。Received date:2012–09–02. Revised date: 2012–10–24.

First author: YAN Mifang (1987–), female, Master, Engineer.

E-mail: yanmifang@

Correspondent author: XUE Lihong (1975–), female, Ph.D., Associate

Professor.

E-mail: xuelh@

第41卷第3期2013年3月

硅酸盐学报

JOURNAL OF THE CHINESE CERAMIC SOCIETY

Vol. 41，No. 3

March，2013

2013-02-28 11:08/kcms/detail/11.2310.TQ.20130228.1108.201303.342_011.html