BaMg_(2-x)(PO_4)_2:xEu^(3+)橙红色荧光粉的制备及发光性质  

Preparation and Luminescence Properties of BaMg_(2-x)(PO_4)_2:xEu^(3+) Salmon Pink-Emitting Phosphor

作　　者：杨志平[1] 周东站[1] 韩月[1] 马淑媛[1] 宋延春[1] 于红伟[2] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002 [2]河北大学电子信息工程学院,河北保定071002

出　　处：《硅酸盐学报》2011年第8期1235-1238,共4页Journal of The Chinese Ceramic Society

基　　金：河北省自然科学基金(F2009000217)资助项目

摘　　要：采用高温固相法合成BaMg2–x(PO4)2:xEu3+橙红色光致荧光粉。研究了激活剂Eu3+掺量及电荷补偿剂对其发光性质的影响。X射线衍射显示样品为纯相BaMg2(PO4)2晶体结构。光致光谱表明,该样品适于UV–LED(ultraviolet–light emitting diode)管芯(350～410 nm)激发,主发射为595 nm(5D0→7F1)、614 nm(5D0→7F2)和700 nm(5D0→7F4)。研究结果表明,随着掺Eu3+量的增大,可以促进5D0→7F1跃迁而相对抑制5D0→7F2跃迁。电荷补偿结果显示:掺入Li+、Na+、K+均能提高发射强度,Li+对595 nm发射强度的提高效果最佳,而K+对614 nm强度的提高效果最佳;增大补偿离子半径可提高5D0→7F2电偶极跃迁几率。BaMg2–x（PO4）2：xEu^3＋ phosphors were synthesized by a high temperature solid state method.The result by X-ray diffraction（XRD） indicates that the sample is a pure phase of BaMg2（PO4）2 crystal structure.The photoluminescence spectra exhibits that the sample fitted a ultraviolet–light emitting diode（UV–LED） chip（350–410 nm） excitation.The main emission peaks locates at 595 nm（^5D0→7F1）,614 nm（^5D0→7F2） and 700 nm（^5D0→^7F4）.The results show that the transition of 5D0→7F1 is enhanced and the transition of ^5D0→^7F2 is inhibited when the amount of Eu^3＋-doped in the BaMg2–x（PO4）2：xEu^3＋ is increased.The charge compensation results show that incorporation of Li＋,Na＋ and K＋ could increase the emission intensity.It was found that Li＋ ion could give the best im-provements of the intensity of 595 nm and K＋ ion to the intensity of 614 nm.The increase of the compensation ionic radius could increase the probability of electric dipole allowed ^5D0→^7F2 transition.

关 键 词：磷酸镁钡 荧光粉 光致发光 发光二极管 电荷补偿 

分 类 号：O482.31[理学—固体物理]