1. 河北师范大学 化学与材料科学学院,河北 石家庄,050016
2. 河北化工医药职业技术学院 化学与环境工程系,河北 石家庄,050026
3. 清华大学 材料科学与工程系 北京,100084
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席翠省;高元哲;王 萍;石士考;王瑞芬;周 济. 白光LED用红色发光粉 LiGd(MoO<sub>4</sub>)<sub>2</sub> : Eu<sup>3+</sup>的制备和发光特性[J]. 发光学报, 2010,31(3): 311-315
XI Cui-sheng;GAO Yuan-zhe;WANG Ping;SHI Shi-kao;WANG Rui-fen;ZHOU Ji. Synthesis and Luminescent Properties of LiGd(MoO<sub>4</sub>)<sub>2</sub> : Eu<sup>3+</sup> Red Phosphors for White LEDs[J]. 发光学报, 2010,31(3): 311-315
席翠省;高元哲;王 萍;石士考;王瑞芬;周 济. 白光LED用红色发光粉 LiGd(MoO<sub>4</sub>)<sub>2</sub> : Eu<sup>3+</sup>的制备和发光特性[J]. 发光学报, 2010,31(3): 311-315 DOI:
XI Cui-sheng;GAO Yuan-zhe;WANG Ping;SHI Shi-kao;WANG Rui-fen;ZHOU Ji. Synthesis and Luminescent Properties of LiGd(MoO<sub>4</sub>)<sub>2</sub> : Eu<sup>3+</sup> Red Phosphors for White LEDs[J]. 发光学报, 2010,31(3): 311-315 DOI:
采用高温固相法制备了LiGd,1-,x,Eu,<,em,>,x(MoO,4,),2,钼酸盐红色发光粉,利用XRD和发光光谱技术对粉体进行了性能表征。结果表明:该系列发光粉均为四方晶系的白钨矿结构,能够被近紫外光(395 nm)有效激发,产生Eu,3+,的,5,D,0,7,F,2,特征跃迁红光发射(616 nm)。,x,=0.4时,即LiGd,0.6,Eu,0.4,(MoO,4,),2,样品的发光强度超过商用红粉Y,2,O,2,S ∶ Eu,3+,发光强度的5倍,虽然比未加入Gd样品 LiEu(MoO,4,),2,的发光强度略低,但LiGd,0.6,Eu,0.4,- (MoO,4,),2,样品的组分中却减少了60%的Eu用量,明显降低了原料成本,更具实用价值,有希望成为白光发光二极管的红色发光材料。
A series of novel red light-emitting phosphors LiGd,1-,x,Eu,<,em,>,x(MoO,4,),2, were synthesized by solid-state reaction at high temperature. Their structure and luminescent properties were investigated in detail. The XRD patterns showed that all the phosphors are isostructural and share a tetragonal scheelite structure of space group ,I,4,1,/,a,88. In the emission spectra of the phosphors, the predominant transition emission is ,5,D,0,7,F,2, (616 nm) of Eu,3+, whereas the other emissions are very weak. The excitation spectra are composed of ligand-to-metal charge transfer bands (CTB) of Mo,6+,-O,2-, as well as a few excitation transitions of Eu,3+, between 4f levels. The LiGd,0.6,Eu,0.4,(MoO,4,),2, phosphor shows very strong emission intensity in comparison with commercial phosphor Y,2,O,2,S ∶ Eu,3+,. Although the fluorescence intensity of LiGd,0.6,Eu,0.4,(MoO,4,),2, is slightly lower than that of the LiEu(MoO,4,),2, the content over 60% Eu,3+, is saved. Therefore, the LiGd,0.6,Eu,0.4,(MoO,4,),2, phosphor significantly reduces the cost of raw materials. It might be a potential candidate for white LED application.
荧光粉钼酸盐Eu3+发光二极管
phosphormolybdateEu3+LED
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