Dual Color Emissions of Sr2-xCaxP2O7: Eu2+, Mn2+ for near UV Excitation
Dual Color Emissions of Sr2-xCaxP2O7: Eu2+, Mn2+ for near UV Excitation
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DOI：
10.1149/2.054203jes
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发表时间：
2012
影响因子：
3.9
通讯作者：
J. J. Yu-J.;Z. Hao;Xia Zhang;Yongshi Luo;Xiaojun Wang;Jiahua Zhang
中科院分区：
文献类型：
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作者：
J. J. Yu-J.;Z. Hao;Xia Zhang;Yongshi Luo;Xiaojun Wang;Jiahua Zhang
采用固相反应法制备了Eu ~（2+）、Mn ~（2+）单掺和共掺的Sr ~（2-x）Ca_xP_2 O_7（x = 0-2）荧光粉。通过X射线衍射、光致发光和荧光衰减等实验测量，研究了Ca 2+含量对晶体相演化的影响。的x依赖的发射带的形状和峰的位置为Eu 2+和Mn 2+的晶相类型和晶场强度与Ca 2+取代Sr 2+的关系进行了讨论。在所有有益于双色发射的组合物中观察到从发射蓝色的Eu 2+到发射橙子的Mn 2+的有效能量转移。在Sr1.25Ca0.75P2O7：Eu 2+，Mn 2+中发现了最宽的发射带和强烈的橙子发射，在近紫外LED的白色光产生中显示出很好的应用前景。(C)2012年电化学学会。[DOI：10.1149/2.054203jes]版权所有。
Eu2+, Mn2+ singly and co-doped Sr2-xCaxP2O7 phosphors (x = 0-2) are prepared by solid state reaction. Crystal phase evolution is studied as a function of Ca2+ content based on the experimental measurements of X-ray diffraction, photoluminescence and fluorescence decay. The x dependent emission band shapes and peak positions for both Eu2+ and Mn2+ are discussed in terms of the crystal phase types and crystal field strength in relation with Ca2+ substitution for Sr2+. An effective energy transfer from blue emitting Eu2+ to orange emitting Mn2+ is observed in all compositions beneficial to dual color emissions. The widest emission band and intense orange emission are found in Sr1.25Ca0.75P2O7: Eu2+, Mn2+, exhibiting promising use in white light generation using near UV LEDs. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.054203jes] All rights reserved.