摘要
采用高温固相法合成了Ba2–xB2O5:xSm3+红色荧光粉。研究了Sm3+掺杂量对样品发光性质的影响。结果表明,合成物质为纯相Ba2B2O5晶体结构。主激发峰为342nm(6H5/2→4H9/2)、359 nm(6H5/2→4D3/2)、372 nm(6H5/2→6P7/2)、400 nm(6H5/2→4F7/2)、436 nm(6H5/2→4G9/2)、450～510 nm(6H5/2→4I13/2,4I9/2,4I11/2,4G7/2)。主发射为550～575 nm(4G5/2→6H5/2)、580～620 nm(4G5/2→6H7/2)及630～660 nm(4G5/2→6H9/2),其中以400 nm激发的峰值最大。随着Sm3+掺量x的增大,发光强度先增大后减小,在x=0.06时达到最大值。分析表明其浓度猝灭的机理是电偶极–电四极相互作用。
The Ba2–xB2O5：xSm3＋ phosphors were synthesized via the high temperature solid state reactions.The effect of the doping quantity of Sm3＋ activator on the luminescence properties was investigated.The results indicate that the sample synthesized is a pure phase of Ba2B2O5.The main excitation peaks were located at 342 nm（6H5/2→4H9/2）,359 nm（6H5/2→4D3/2）,372 nm（6H5/2→6P7/2）,400 nm（6H5/2→4F7/2）,436 nm（6H5/2→4G9/2） and 450～510 nm（6H5/2→4I13/2,4I9/2,4I11/2,4G7/2）,respectively.The main emission was located at 550–575 nm（4G5/2→6H5/2）,580–620 nm（4G5/2→6H7/2） and 630～660 nm（4G5/2→6H9/2）.The most intense emission was excited at a wavelength of 400 nm.It was found that the luminescent intensity firstly increased and then decreased with increasing Sm3＋ content（x）.The luminescent intensity had the best value when Sm3＋ content x was 0.06.The concentration quenching mecha-nism was the electric dipole–electric quadrupole interaction in the phosphor.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2012年第3期469-472,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
关键词
红色荧光粉
光致发光
二硼酸钡
浓度猝灭
red-emitting phosphor
photoluminescence
barium borate
concentration quenching
