绿色荧光粉NaCaPO4：Tb^3＋的制备与发光特性  

Preparation and Luminescent Properties of Green NaCaPO_4∶Tb^(3+) Phosphor

作　　者：杨志平[1] 王少丽[1] 杨广伟[1] 田晶[2] 李盼来[1] 李旭[1] 

机构地区：[1]河北大学物理科学与技术学院发光与显示研究所,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：《发光学报》2008年第1期81-84,共4页Chinese Journal of Luminescence

基　　金：河北省科学技术发展基金资助项目(51215103b)

摘　　要：采用高温固相法合成了适用于UVLED芯片激发的NaCaPO4∶Tb3+绿色荧光粉并对其发光性质进行了研究。该荧光粉的发射峰位于418,440,492,545,586,622nm,分别对应Tb3+的5D3→7F5、5D3→7F4、5D4→7F6、5D4→7F5、5D4→7F4、5D4→7F3能级跃迁。其中位于492,545nm的发射峰最强,样品发射很好的绿光。主要激发峰位于380~400nm之间,属于4f→4f电子跃迁吸收,与UVLED芯片的发射相匹配。考察了Tb3+掺杂浓度和Li+,Na+和K+作为电荷补偿剂对样品发光性能的影响:Tb3+的最佳掺杂浓度为10%,以Li+的补偿效果最好。NaCaPO4∶Tb3+是一种适用于白光LED的绿色荧光材料。The NaCaPO4 ： Tb^3＋ green phosphor applicable for UVLED chip was synthesized by the general high temperature solid-state reaction and its luminescence properties were investigated. It shows six major emission peaks locating at 420,442,492,545,584 and 620 nm, which correspond to the ^5D3→^7F5、^5D3→^7F4、^5D4→^7F6、^5D4→^7F5、^5D4→^7F4 and ^5D4→^7F3 typical transition of Tb^3＋ , respectively. The most intense peaks located at 492 nm and 545 nm and the phosphor shows excellent green emission. The excitation spectra contain a weak broad band extending from 200 to 280 nm and two peaks at 330 - 390 nm, which correspond well with the emission of UVLED （350 - 410 nm）. The effects of doped-Tb^3＋ concentration and charge-compensating of Li ^＋ , Na ^＋ and K^＋ on the emission intensity were also investigated. It shows that the optimum dopedTb^3＋ concentration is 10% and Li^＋ gives the best improvement to enhance the intensity of the emission. The NaCaPO4： Tb^3＋ is a potential green-emitting phosphor for white light emitting diode （W-LED）.

关 键 词：发光 荧光粉 NaCaPO4:Tb^3+ 白光LED 

分 类 号：O482.31[理学—固体物理]