摘要
采用高温固相法在空气中合成了一系列掺杂稀土离子的卤硼酸盐荧光体,研究了其发光性质和基质组成对稀土离子共掺杂的荧光体发光性质的影响.研究结果表明,在Eu3+和Tb3+共掺杂的体系中存在电子转移,因此出现了Eu3+,Eu2+和Tb3+共存于同一基质共同发射的现象.Ce3+对Eu2+和Tb3+具有敏化作用,可增强其发射强度.基质的组成对稀土离子的发射峰位和发射强度有明显影响.
M2B5O9X： Re（M =Ca, Sr, Ba; X =Cl, Br; Re = Eu, Tb） phosphors were synthesized via solid state method. The products were characterized with X-ray powder diffraction and luminescence spectrometer. The luminescent properties as well as the influences of the matrix composition and other doping ions on the luminescence of the rare earth ions of the co-doped phosphors were investigated. The coexistence of Eu^3＋ , Eu^2＋ and Tb^3＋ were observed in these matrices. The phenomenon may be explained by the electron transfer theory. The sensitization of Ce^3＋ ion improves the intensity of emission of Eu^2＋ and Tb^3＋. The competition between electron transfer among conjugate rare earth ions and energy migration might be the reasons for the observation. We predict a novel trichromatic phosphor co-doped with Eu^3＋ -Tb^3＋ in M2B5O9X.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第8期1519-1522,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:90201032)
华南农业大学校长基金(批准号:4900-K05109)资助
关键词
高温固相合成
光谱特征
电子转移
能量传递
Solid state synthesis at high temperature
Luminescence character
Electronic transport
Energy migration
