稀土掺杂红色发光材料的制备与改性研究
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摘要
采用高温固相法合成了不同助溶剂掺杂的CaO:Eu~(3+)荧光粉体。在209nm激发下,得到640nm较强烈的红光发射峰,归属于Eu~(3+)离子~5D_0~7F_2电子跃迁。并研究了添加助溶剂对荧光粉发光强度的改变,当添加助溶剂NH4Cl后,荧光粉体的发光强度并没有得到提高,反而使得荧光粉性能变差,而当添加H_3BO_3助溶剂后,荧光粉的发光强度得到10%左右的提升;最后研究了煅烧温度对荧光粉体发光性能的影响,样品在1000℃煅烧后表现出来的发光强度最差,而在1100℃煅烧后,荧光粉的发光性能达到最高。
CaO: Eu~(3+) phosphors with different cosolvents doping were synthesized by solid state method.Under the 209 nm excitation,a relatively strong red emission peak at 640 nm is obtained,which belongs to the ~5D_0→~7F_2 electron transition of Eu~(3+) ion.The effect of cosolvent doping on the luminescent intensity of phosphors was studied.The luminescent intensity of phosphors decreased with NH_4Cl doping.While,the luminescent intensity of phosphors increased about 10% times when adding H_3BO_3 cosolvent.Finally,the effect of calcination temperature on the luminescent properties of phosphors was studied.The luminescent properties of phosphors reached the highest after 1100℃ calcination,but dropt after calcined at 1000℃.
CaO: Eu~(3+) phosphors with different cosolvents doping were synthesized by solid state method.Under the 209 nm excitation,a relatively strong red emission peak at 640 nm is obtained,which belongs to the ~5D_0→~7F_2 electron transition of Eu~(3+) ion.The effect of cosolvent doping on the luminescent intensity of phosphors was studied.The luminescent intensity of phosphors decreased with NH_4Cl doping.While,the luminescent intensity of phosphors increased about 10% times when adding H_3BO_3 cosolvent.Finally,the effect of calcination temperature on the luminescent properties of phosphors was studied.The luminescent properties of phosphors reached the highest after 1100℃ calcination,but dropt after calcined at 1000℃.
引文
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[9] 牟中飞,王银海,胡义华,等.Y3Al5O12:Ce3+的余辉和热释光特性[J].物理学报,2011,60(1):182-187.
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[2] Lin Y,Tang Z,Zhang Z,et al.Luminescence of Eu2+,and Dy3+,activated R3MgSi2O8-based (R=Ca,Sr,Ba) phosphors[J].Journal of Alloys & Compounds,2003,348(1-2):76-79.
[3] 李松坤,王小平,王丽军,等.长余辉发光材料的研究进展[J].材料导报,2014,28(5):63-67.
[4] 杨志平,郭智,王文杰.Y2O2S:Eu3+,Mg2+,Ti4+红色材料的制备和长余辉性能[J].发光学报,2004,25(2):183-187.
[5] 林元华,张中太,张枫,等.铝酸盐长余辉光致发光材料的制备及其发光机理的研究[J].材料导报,2000,14(1):35-37.
[6] Xu X,Tang Y,Mo F,et al.Synthesis and luminescent properties of CaTiO3 :Eu3+,Al3+,phosphors[J].Ceramics International,2014,40(7):10887-10892.
[7] 袁丽霞,王红梅,连媛,等.稀土长余辉发光材料SrAl2O4:Eu～(2+),Dy～(3+)的制备及性能研究[J].嘉兴学院学报,2011,23(6):73-77.
[8] 刘晓霞,覃海连,彭桂花,等.PEG对燃烧合成CaAl2O_4:Eu～(2+),Nd～(3+)长余辉发光材料的影响[J].化学与生物工程,2012,29(3):45-47.
[9] 牟中飞,王银海,胡义华,等.Y3Al5O12:Ce3+的余辉和热释光特性[J].物理学报,2011,60(1):182-187.
[10] Ye J,Wang Q,Zhou H,et al.Luminescence properties and high thermal stability of tunable blue-green-emitting phosphor Gd4.67Si3O13:Ce3+,Tb3+[J].Ceramics International,2016,42(2):3309-3316.