Tb3+浓度对SrMoO4∶Tb3+发光性能的影响

关丽; 左金改; 刘冲; 孙明生; 刘海燕; 李旭; 杨志平; 傅广生

doi:doi:10.3788/fgxb20113208.0779

发光学报, 2011, 32 (8): 779, 网络出版: 2011-08-29

Tb³⁺浓度对SrMoO₄∶Tb³⁺发光性能的影响

Influence of Tb³⁺Concentration on The Luminescent Properties of SrMoO₄∶Tb³⁺

论文大纲

关丽 ^*左金改刘冲孙明生刘海燕李旭杨志平傅广生

作者单位

河北大学物理科学与技术学院学院, 河北保定071002

钼酸锶溶胶-燃烧法绿色荧光 Tb3+ Tb3+ SrMoO4 sol-combustion method green phosphor

摘要

采用溶胶-燃烧法合成了Tb3+掺杂的SrMoO4荧光粉并研究了它的发光性能。X射线衍射(XRD)显示, 前驱物在750 ℃下灼烧3 h得到的样品为纯相的SrMoO4。样品的激发谱由一宽带和一组窄峰组成, 其中激发强度较强的峰位于288 nm和375 nm。发射谱由4组窄带组成, 其中最强峰位于548 nm。对于548 nm(5D4→7F5 )发射峰, 最佳的Tb3+ 掺杂摩尔分数为0.05, 其浓度猝灭机理为Tb3+ 离子的电偶极-电偶极相互作用。当尿素用量为理论用量的3倍时, 发光强度最强。最佳烧结温度为750 ℃, 最佳烧结时间为3 h。当Tb3+摩尔分数为0.05时, 样品发光的CIE色坐标为(0.279 4, 0.565 2)。结果表明, Tb3+ 激活的SrMoO4是一种较好可应用于白光LED的紫外激发的绿光发光材料。

Abstract

Trivalent terbium (Tb3+) doped strontium molybdate (SrMoO4) was synthesized by sol-combustion method and the crystal structure and luminescent properties were investigated in this paper. The X-ray diffraction patterns (XRD) showed that the phosphors sintered at 750 ℃ for 3 h were pure SrMoO4 phase. The excitation spectrum consisted of a broad band and a series of narrow bands, in which the higher energy peaks located at 288 nm and 375 nm, respectively. The emission spectrum was composed of four narrow bands and the strongest emission peak was located at 548 nm. The appropriate doping molar fraction of Tb3+ was 0.05 for the 548 nm emission. The concentration quenching of 548 nm (5D4→7F5 ) was attributed to d-d interaction. When the dosage of urea was 3 times of theory dosage, the luminescent intensity reached the maximum. The optimal sintering temperature and time were 750 ℃ and 3 h, respectively. These results showed that this Tb3+ activated SrMoO4 was a promising green phosphor for ultraviolet (UV) and blue InGaN-based white LED.

参考文献

[1] Nakamura S, Mukai T, Senoh M. Candela-class high-brightness InGaN/AlGaN double-heterostructure blue-light-emitting diodes ［J］. Appl. Phys. Lett., 1994, 64(13):1687-1689.

[2] Kim J S, Jeon P E, Choi J C, et al. Warm-white-light emitting diode utilizing a single-phase full-color Ba3MgSi2O8∶Eu2+, Mn2+ phosphor ［J］. Appl. Phys. Lett., 2004, 84(15):2931-2933.

[3] Xi Cuisheng, Gao Yuanzhe, Wangping, et al. Synthesis and luminescent properties of LiGd(MoO4)2∶Eu3+ red phosphors for white LEDs ［J］. Chin. J. Lumin. (发光学报), 2010, 31(3):311-315 (in Chinese).

[4] Liu Jie, Sun Jiayue, Shi Chunshan. The development of the white converter based on LED ［J］. Chem. Bull. (化学通报), 2005(6):417-424 (in Chinese).

[5] Zhang Mei, Wang Jing, Zhang Qiuhong, et al. Optical properties of Ba2SiO4∶Eu2+ phosphor for green light-emitting diode (LED) ［J］. Mater. Res. Bull., 2007, 42(1):33-39.

[6] Xie R J, Hirosaki N, Sakuma K, et al. Eu2+-doped Ca-α-SiAlON: A yellow phosphor for white light emitting diodes ［J］. Appl. Phys. Lett., 2004, 84(26):5404-5406.

[7] Yang Ping, Lin Jianhua, Yao Guangqing. Luminescence and preparation of LED phosphor Ca8Mg(SiO4)4Cl2∶Eu2+ ［J］. J. Rare Earth., 2005, 23(5):633-638.

[8] Sang Shiyun, Wang Xifeng, Xia Wei, et al. Preparation and encapsulation characteristics of silicate-based phosphor for white-light-emitting LED ［J］. Chin. J. Lumin. (发光学报), 2009, 30(4):503-508 (in Chinese).

[9] Gao Fei, Liang Lifang, Guo Chongfeng. Preparation and luminescence of red light-emitting phosphors based on Li3Ba2Ln3-xEux(MoO4)8 by sol-gel method ［J］. Chin. J. Lumin. (发光学报), 2009, 30(4):610-616 (in Chinese).

[10] Yan Xiaosong, Li Wanwan, Liu Ji, et al. A single phase white-light-emitting phosphor suitable for UV-LED excitation［J］. Chin. J. Lumin. (发光学报), 2010, 31(1):39-43 (in Chinese).

[11] Hu Yunsheng, Zhuang Weidong, Ye Hongqi, et al. A novel red phosphor for white light emitting diodes ［J］. J. Alloy. Compd., 2005, 390(1-2):226-229.

[12] Chiu C H, Wang M F, Lee C H, et al. Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x-(MoO4)x as a near-UV convertible phosphor ［J］. J. Solid. Stat. Chem., 2007, 180(2):619-627.

[13] Li Xu, Yang Zhiping, Guan Li, et al. Luminescent properties of alkali metal ion and trivalent europium ion co-activated alkaline earth molybdate phosphors ［J］. J. Syn. Cryst. (人工晶体学报), 2007, 36(5):1192-1196 (in Chinese).

[14] Zhao Xiaoxia, Wang Xiaojun, Chen Baojiu, et al. Luminescent properties of Eu3+ doped α-Gd2(MoO4)3 phosphor for white light emitting diodes ［J］. Opt. Mater., 2007, 29(12):1680-1684.

[15] Wang Jiaguo, Jing Xiping, Yan Chunhua, et al. Influence of fluoride on f-f transitions of Eu3+ in LiEuM2O8 (M=Mo, W) ［J］. J. Lumin., 2006, 121(1):57-61.

[16] Wang Zhengliang, Liang Hongbin, Zhou Liyu, et al. Luminescence of (Li0.333Na0.334K0.333)Eu (MoO4)2 and its application in near UV InGaN-based light-emitting diode ［J］. Chem. Phys. Lett., 2005, 412(4-6):313-316.

[17] Xia Guodong, Zhou Shengming, Zhang Junji, et al. Solution combustion synthesis, structure and luminescence of Y3Al5O12∶Tb3+ phosphors ［J］. J. Alloy. Compd., 2006, 421(1-2):294-297.

[18] Li Xu, Yang Zhiping, Guan Li, et al. A new yellowish green luminescent material SrMoO4∶Tb3+ ［J］. Mater. Lett., 2009, 63(12):1096-1098.

[19] Yang Zhiping, Ma Xin, Song Zhaofeng, et al. Luminescent properties of LiSrPO4∶Tb3+ green phosphor ［J］. Chin. J. Lumin. (发光学报), 2010, 31(2):185-188 (in Chinese).

[20] Dexter D L, James H S. Theory of concentration quenching in inorganic phosphors ［J］. J. Chem. Phys., 1954, 22(6):1063-1070.

关丽, 左金改, 刘冲, 孙明生, 刘海燕, 李旭, 杨志平, 傅广生. Tb³⁺浓度对SrMoO₄∶Tb³⁺发光性能的影响[J]. 发光学报, 2011, 32(8): 779. GUAN Li, ZUO Jin-gai, LIU Chong, SUN Ming-sheng, LIU Hai-yan, LI Xu, YANG Zhi-ping, FU Guang-sheng. Influence of Tb³⁺Concentration on The Luminescent Properties of SrMoO₄∶Tb³⁺[J]. Chinese Journal of Luminescence, 2011, 32(8): 779.

Tb³⁺浓度对SrMoO₄∶Tb³⁺发光性能的影响

关于本站 Cookie 的使用提示

全站搜索