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| 1 | 白光LED荧光粉研究及应用新进展显示文摘基于白光发光二极管技术的迅速发展以及荧光粉对白光LED器件的发光效率、显色性和使用寿命等性能的决定性影响,系统阐述了蓝光LED芯片激发用铝酸盐、硅酸盐、氮化物和氮氧化物系列黄色、红色和绿色荧光粉的研究进展和应用现状。探讨了上述荧光粉的研究重点、发展趋势和应用前景,指出需要进一步提高铝酸盐黄粉的发光效率,开发新型高光效氮化物和氮氧化物红粉和绿粉及其低成本制备技术,以满足高光效、高显色、低光衰型白光LED器件制作需要。 | 刘荣辉 何华强 黄小卫 胡运生 刘元红 庄卫东 | 2012 | 半导体技术2012，37，3： | 25 |
| 2 | 白光LED用红色发光粉LiGd(MoO_4))2:Eu^(3+)的制备和发光特性显示文摘采用高温固相法制备了LiGd1-xEux(MoO4)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(395nm)有效激发,产生Eu3+的5D0→7F2特征跃迁红光发射(616nm)。x=0.4时,即LiGd0.6Eu0.4(MoO4)2样品的发光强度超过商用红粉Y2O2S:Eu3+发光强度的5倍,虽然比未加入Gd样品LiEu(MoO4)2的发光强度略低,但LiGd0.6Eu0.4-(MoO4)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。 | 席翠省 高元哲 王萍 石士考 王瑞芬 周济 | 2010 | 发光学报2010，31，3： | 23 |
| 3 | A potential red-emitting phosphors scheelite-like triple molybdates LiKGd_2(MoO_4)_4:Eu^(3+) for white light emitting diode applications显示文摘A series of novel red-emitting phosphors scheelite-like triple molybdates LiKGd2-xEux(MoO4)4(0.1 ≤ x ≤ 1.9) were synthesized by solid state reaction method and their photoluminescence properties were investigated. The photoluminescence results show that all samples can be excited efficiently by UV (396 nm) light and blue (466 nm) light and emit red (615 nm) light with line spectra,which are coupled well with the characteristic emission from UV-LED and blue LED,respectively. The experimental results and their analysis suggest that the energy transfer occurs due to dipole-dipole interactions among Eu3+ ions in LiKGd2-xEux(MoO4)4. Compared with Ca0.8MoO4: Eu 30+.2,the emission intensity of LiKGd0.9(MoO4)4: Eu 13.+1 is about 1.4 times higher and the CIE chromaticity coordinates are as close to the National Television System Committee (NTSC) standard values as those of Ca0.8MoO4: Eu 30+.2. The optical properties suggest that LiKGd0.9(MoO4)4: Eu 13.+1 is an efficient red-emitting phosphor for white LEDs applications. | XIE An YUAN XiMing WANG FengXiang | 2011 | Science China(Technological Sciences)2011，54，1： | 7 |
| 4 | Synthesis of LiEu_(1-x)Bix(MoO_4)_2 red phosphors by sol-gel method and their luminescent properties显示文摘The Bi3+ doped molybdate-based red-emitting phosphors, LiEu1-xBix(MoO4)2, were successfully synthesized with a sol-gel method. The prepared LiEu1-xBix(MoO4)2 phosphors exhibited pure and intense red emission at 613 nm under the excitation of near-UV 394 nm. It was discussed in detail that the influence of the synthesis conditions such as the doping concentration of Bi3+, the dose of citric acid, pH of the precursor solution and the sintering temperature on the emission intensity of the phosphors. According to the results, the optimal condition was obtained: the doping concentration of Bi3+ was 15 mol.%, molar ratio of citric acid to metal ions was 1.5:1, pH of the precursor solution was 1.0 and the sintering temperature was 800 ?C. The X-ray diffraction (XRD) patterns of the LiEu0.85Bi0.15(MoO4)2 phosphor prepared under the optimal condition indicated that the phosphor was single phase with tetragonal scheelite structure. The Commission Internationale de l'E-clairage (CIE) chromaticity coordinates of LiEu0.85Bi0.15(MoO4)2 were (x=0.655, y=0.345), which were closer to the national television stan-dard committee (NTSC) standard values (x=0.670, y=0.330) than that of a commercial red phosphor of Y2O2S:Eu3+(x=0.630, y=0.350). This LiEu0.85Bi0.15(MoO4)2 red phosphor is a promising candidate for the fabrication of white light-emitting diode (W-LED) with near-UV chips. | 雷惊雷 于艳 李凌杰 程士宝 李冠宇 李念兵 | 2012 | Journal of Rare Earths2012，30，4： | 7 |
| 5 | Structural investigation and luminescent properties of BaZr(BO_3)_2:Eu^(3+) phosphors containing Si显示文摘Si4+-doped BaZr(BO3)2:Eu3+ phosphors are prepared by a conventional solid-state reaction.The influence of Si4+ addition on the charge transfer state of Eu3+-O2- and photoluminescence(PL) properties of BaZr(BO3)2:Eu3+ are discussed.Room temperature PL spectra indicated that efficient emission is obtained by Si doping.Increased values for the peak-peak ratio(PPR) of BaZr(BO3)2:Eu3+ at higher Si doping concentrations implied that the Eu3+ ion is located in a more asymmetric environment in BaZr0.8Si0.2(BO3)2:Eu3+ than in the undoped samples.The Judd-Ofelt parameters Ωλ(λ=2,4) were calculated from the PL data,giving results that were consistent with those from the PPR.The maximum radiative quantum efficiency was achieved at a Si doping concentration of 20 mol%. | ZHANG ZhongPeng LI GuangMin ZHANG XiaoSong XU ShengYan JI Ting LI Lan | 2010 | Chinese Science Bulletin2010，55，29： | 3 |
| 6 | Red emitting tungsto-molybdate phosphor for near-ultraviolet light-emitting diodes-based solid-state lighting显示文摘A series of novel red tungsto-molybdate phosphors, LiEu1 xSmx(WO4)0.5(MoO4)1.5 (x = 0, 0.25%, 0.50%, 0.75%, 1.00%, 2.00%, 4.00%, 6.00%, 8.00% and 10.00%), were synthesized using conventional solid state reaction methods. The experimental results indicate that the introduction of Sm3+ changes neither the crystal structure nor the shape and position of the emission spectra. However, it extends the excitation region at 400 nm and enhances the emission at 615 nm. The reason for the improvement of red emission of Eu3+ by the introduction of Sm3+ and the energy transfer mechanism from Sm3+ to Eu3+ was investigated in detail. | XIE An YANG WeiYi ZHANG MinShu | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，7： | 2 |
| 7 | 白光LED用新型高效红色荧光粉的制备及其发光性能研究显示文摘用Na+做电荷补偿剂,Sm3+做敏化剂,采用高温固相法制备了Ca0.5MoO4:Eu3+0.25-x,Sm3+x,Na+0.25(x=0,0.001,0.003,0.005,0.008,0.01,0.02,0.03,0.05,0.07,0.09)系列红色荧光粉,实验结果表明:Sm3+的加入没有改变CaMoO4:Eu3+,Na+的晶体结构,也没有改变粉体发射光谱的形状和发射峰的位置,而是加宽了荧光粉CaMoO4:Eu3+,Na+激发光谱在400 nm左右的吸收峰,有利于样品的激发峰和近紫外LED芯片相匹配,并且提高了荧光粉在615 nm处发射光谱的发光强度.本文主要对Sm3+提高荧光粉的发光强度的原理进行探讨,研究结果证明在CaMoO4基质中存在Sm3+-Eu3+之间能量传递,此外得出Sm3+的最佳掺杂浓度是0.5 at.%. | 谢安 袁曦明 王凤祥 | 2011 | 中国科学:物理学、力学、天文学2011，41，3： | 1 |
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