Eu2+掺杂浓度对Ca2MgSi2O7∶Eu2+荧光粉发光特性的影响

曹仕秀; 韩涛; 涂铭旌

doi:10.7498/aps.60.127802

摘要

采用化学共沉淀法制备了Ca2-xMgSi2O7:xEu2+绿色荧光粉.用X射线衍射仪、荧光分光光度计及光色综合测试系统对Ca2-xMgSi2O7:xEu2+绿色荧光粉的相结构、发光性能进行了测试.结果表明:其激发光谱分布在300480 nm波长范围,谱峰位于389,430 nm处,可以被InGaN管芯产生的360480 nm辐射有效激发;在波长为430 nm蓝光激发下,其发射光谱谱峰位于531 nm处.Ca2-xMgSi2O7:xEu2+绿色荧光粉的发光强度随Eu2+掺杂量的增加而增强,当Eu2+掺杂量x为0.04时,发光强度达到最大值,而后开始降低,发生浓度猝灭.根据Dexter能量共振理论,浓度猝灭是由电偶极-电偶极相互作用引起的.

关键词:

Abstract

The Ca2-xMgSi2O7∶xEu2+ green phosphor is synthesized by chemical coprecipitation. X-ray diffraction and the fluorescence spectrophotometry are used to investigate the structural and the luminescent properties of the Ca2-xMgSi2O7∶xEu2+ green phosphor. The result shows that the excitation spectrum of the Ca2-xMgSi2O7∶xEu2+green phosphor extends from 300 nm to 480 nm, and the peaks appear around 389 and 430 nm, thus the phosphor can be excited effectively by InGaN chip in a range of 360480 nm. The peak of the emission spectrum appears around 531 nm. The emission spectrum intensity first increases and then decreases with Eu2+ doping concentration increasing. The strongest emission intensity is obtained when Eu2+doping concentration reaches 0.04. The concentration self-quenching is attributed to the d-d interaction according to the Dexter theory.

Keywords:

作者及机构信息

1.
重庆文理学院材料交叉学科研究中心,重庆 402168

基金项目: 重庆市科技攻关计划(批准号:2009AB4171)和重庆市教育委员会科学技术研究基金(批准号:KJ111201)资助的课题.

Authors and contacts

1.
Research Center for Material Interdisciplinary Science, Chongqing University of Arts and Sciences, Chongqing 402168, China

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施引文献

[1]	Shen C, Shao Q Y, Han X L, Dong Y, Jing J Q 2010 Chin. J. Lumin. 31 44 (in Chinese)[沈超、邵起越、韩学林、董岩、蒋建清 2010 发光学报 31 44]
[2]	Park J K, Kim C H, Park S H 2004 Appl. Phys. Lett. 84 1647
[3]
[4]
[5]	Zhang X M, Li W L, Shi L, Qiao X B, Seo H J 2010 Appl. Phys. B 99 279
[6]	Yang Z P, Liu Y F 2006 Acta Phys. Sin. 55 4946 (in Chinese) [杨志平、刘玉峰 2006 物理学报 55 4946]
[7]
[8]	Wang Z J, Li P L, Wang G, Yang Z P, Guo Q L 2008 Acta Phys. Sin. 57 4575 (in Chinese) [王志军、李盼来、王刚、杨志平、郭庆林 2008 物理学报 57 4575]
[9]
[10]	Zhang S H, Hu J F, Zhou M B, Wang J J, Xie B 2010 Chin. J. Lumin.31 54 (in Chinese)[章少华、胡江峰、周明斌、王建军、谢冰 2010 发光学报 31 54]
[11]
[12]	Guo J L, Shen Y N 2009 J. Inner Mongolia Normal Univ. (Nat. Sci. Ed.) 38 366 (in Chinese)[郭金玲、沈岳年 2009 内蒙古师范大学学报 (自然科学汉文版) 38 366]
[13]
[14]
[15]	Fang Y, Ye X Y 2008 J. Jiangxi Normal Univ. (Nat. Sci.) 32 273 (in Chinese) [方英、叶信宇 2008 江西师范大学学报 (自然科学版) 32 273]
[16]	Zhang X Y, Zhang L L, Zhang Y P, Dong F, Yu C C 2010 J. Chin. Ceram. Soc. 38 206 (in Chinese) [张希艳、张亮亮、张云鹏、董飞、于冲冲 2010 硅酸盐学报 38 206 ]
[17]
[18]	Ma M X,Zhu D C,Tu M J 2009 Acta Phys. Sin. 58 5826 (in Chinese) [马明星、朱达川、涂铭旌 2009 物理学报 58 5826]
[19]
[20]
[21]	Dexter D L, Schulman J H 1954 J. Chem. Phys. 22 1063
[22]
[23]	Yang Z P, Ma X, Zhao P P, Song Z F 2010 Acta Phys. Sin. 59 5387 (in Chinese) [杨志平、马欣、赵盼盼、宋兆丰 2010 物理学报 59 5387 ]
[24]	Wang Z J, Liu H Y, Yang Z P, Guo Q L, Li P L 2009 J. Chin. Ceram. Soc. 37 1585 ( in Chinese) [王志军、刘海燕、杨志平、郭庆林、李盼来 2009 硅酸盐学报 37 1585]
[25]
[26]
[27]	Yang Z P, Ma S Y, Yu H W, Ma X 2010 J. Func. Mater. 41 1228 (in Chinese) [杨志平、马淑媛、于红伟、马欣 2010 功能材料 41 1228]
[28]
[29]	Aitasalo T, Hls J, Kirm M 2007 Radiat. Meas. 42 644
[30]	Zhang X G, Zhang J L, Wang R 2010 Am. Ceram. Soc. 93 1368
[31]

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