Photoluminescent properties of K2GeF6:Mn4+ red phosphor synthesized from aqueous HF/KMnO4 solution
Photoluminescent properties of K2GeF6:Mn4+ red phosphor synthesized from aqueous HF/KMnO4 solution
复制标题
DOI：
10.1063/1.3160303
复制
发表时间：
2009-07-01
影响因子：
3.2
通讯作者：
Takahashi, Toru
中科院分区：
文献类型：
--
作者：
Adachi, Sadao;Takahashi, Toru
本文介绍了一种在HF/KMnO_4混合溶液中用湿法化学腐蚀Ge颗粒合成K_2GeF_6：Mn ~（4+）红色荧光粉的简便方法。X射线衍射表明，合成的荧光粉具有三角结构（空间群=D-3d（3）-P3 m1）。利用光致发光（PL）和PL激发光谱研究了K2 GeF 6：Mn 4+的光学性质。K_2GeF_6：Mn ~（4+）的室温零声子线发射和激发能量分别为1.99eV（E ~（2 -）>（4）A ~（2-））、2.44eV（（4）A ~（2-）> T ~（4-）（2））和2.80eV（（4）A ~（2-）> T ~（4-）（1））。由于MnF 6 -2八面体的三角畸变，一些局部振动电子发射模式在约5 meV的能量中分裂。光致发光的温度依赖性可以合理地解释的基础上的玻色-爱因斯坦统计。
A simple method of synthesizing K2GeF6:Mn4+ red phosphor has been demonstrated by wet chemical etching of Ge shots in HF/KMnO4 mixed solution. The x-ray diffraction pattern suggests that the synthesized phosphor has the trigonal structure (space group=D-3d(3)-P3m1). The optical properties of K2GeF6:Mn4+ are investigated using photoluminescence (PL) and PL excitation spectroscopies. The room-temperature zero-phonon line emission and excitation energies in K2GeF6:Mn4+ are determined to occur at similar to 1.99 eV (E-2 ->(4)A(2)), similar to 2.44 eV ((4)A(2)-> T-4(2)), and similar to 2.80 eV ((4)A(2)-> T-4(1)). Some local vibronic emission modes are split in energies of about 5 meV due to the trigonal distortion of the MnF6-2 octahedra. The temperature-dependent PL properties can be reasonably explained on the basis of the Bose-Einstein statistics.