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采用高温固相法合成R2-x(MoO4)3:xEu3+ (R=Y,Gd)系列红色荧光粉.研究了煅烧温度、助熔剂的含量和Eu3+的掺杂量对样品发光性能的影响,并对样品的物相组成、激发和发射光谱进行分析.结果表明,样品Gd0.6(MoO4)3:1.4Eu3+在800℃左右煅烧时呈单斜晶结构,当煅烧温度提高到950℃左右,呈正交斜晶结构;样品Y0.2(MoO4)3:1.8Eu3+在800℃左右煅烧时已经完全形成了正交结构,当煅烧温度升高到1000℃左右时,其正交结构得到保持,没有发生相变.其中,助熔剂NH4 C1的含量占样品总量的3%,煅烧温度为1000℃,保温3h得到的样品Gd0.6 (MoO4)3:1.4Eu3+和Y0.2 (MoO4)3:1.8Eu3+的发光性能达到最佳.另外,由激发和发射光谱分析表明,该荧光粉可以被近紫外光(395 nm)和蓝光(465 nm)有效激发,发射峰值位于612 nm的红光,对应于Eu3+离子的5 D0→7F2跃迁,是一种可应用在紫外光和蓝光芯片激发产生白光LED的红色荧光粉.

参考文献

[1] Neeraj S.;Kijima N.;Cheetham AK. .Novel red phosphors for solid-state lighting: the system NaM(WO4)(2-x)(MoO4)(x): Eu3+ (M=Gd, Y, Bi)[J].Chemical Physics Letters,2004(1/3):2-6.
[2] Hu Y S;Zhuang W D;Ye H Q et al.A novel red phosphor for white light emitting diodes[J].Journal of Alloys and Compounds,2005,390(1-2):228-229.
[3] Wang JG;Jing XP;Yan CH;Lin LH .Ca1-2xEuxLixMoO4: A novel red phosphor for solid-state lighting based on a GaN LED[J].Journal of the Electrochemical Society,2005(3):G186-G188.
[4] 吴亮,刘光华,李江涛.Eu3+掺杂Y2O3-Al2O3-SiO2玻璃的制备与荧光性能研究[J].影像科学与光化学,2011(04):287-296.
[5] 莎仁,王喜贵.纳米晶LaAlO_3掺Eu~(3+)的复合沉淀法制备及发光性质[J].影像科学与光化学,2009(06):435-441.
[6] Zeng XQ;Im SJ;Jang SH;Kim YM;Park HB;Son SH;Hatanaka H;Kim GY;Kim SG .Luminescent properties of (Y,Gd)BO3 : Bi3+, RE3+ (RE = Eu, Tb) phosphor under VUV/UV excitation[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2006(1):1-6.
[7] Jong Seong Bae;Byung Kee Moon;Jung Hyun Jeong;Soung Soo Yi;Jung Hwan Kim .Luminescence characteristics of pulsed-laser-ablated Y_(1.35)Gd_(0.6)O_(3):Eu~(3+) thin-film phosphors[J].Journal of Applied Physics,2005(4):043513-1-043513-5-0.
[8] Dorenbos P .The Eu3+ charge transfer energy and the relation with the band gap of compounds[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2005(1/2):89-104.
[9] 刘晃清,秦伟平,张继森.ZrO2中Eu3+的发光特性[J].光谱学与光谱分析,2005(01):19-22.
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