Sm3+掺杂对CaMoO4∶Eu3+红色荧光粉结构和发光性质的影响

丁洪岩; 孙江亭; 刘威; 孟庆裕; 吕树臣

doi:doi:10.3788/fgxb20113205.0456

发光学报, 2011, 32 (5): 456, 网络出版: 2011-06-24

Sm³⁺掺杂对CaMoO₄∶Eu³⁺红色荧光粉结构和发光性质的影响

Effect of Sm³⁺ Doping on Structural and Luminescent Properties of CaMoO₄∶Eu³⁺ Red Phosphors

论文大纲

丁洪岩 ^*孙江亭刘威孟庆裕吕树臣

作者单位

哈尔滨师范大学物理与电子工程学院黑龙江省先进功能材料与激发态重点实验室，黑龙江哈尔滨150025

CaMoO4∶Eu3+红色荧光粉白光LED Sm3+离子共沉淀法 CaMoO4∶Eu3+ red phosphors white LED Sm3+ ion coprecipitation method

摘要

采用共沉淀法制备了CaMoO4∶Eu3+，Sm3+纳米荧光粉材料。系统研究了Sm3+离子的引入对CaMoO4∶Eu3+材料的结构和发光性质的影响。结果表明: 纳米材料的尺寸随着Sm3+离子掺杂浓度的增加而变小。Sm3+的引入，可实现Sm3+和Eu3+之间的能量传递，使Eu3+在近紫外405 nm处的激发增强，进而使Eu3+在613 nm的红光发射增强，且Sm3+的摩尔分数为5%时，发光强度最强。计算得到CaMoO4∶0.1Eu3+和CaMoO4∶0.1Eu3+，0.05Sm3+红光发射的色度坐标分别为(0.661，0.329)和(0.667,0.328)。可见，Sm3+的引入可有效提高CaMoO4∶0.1Eu3+发光的色纯度，使之更好地接近国际标准值(0.67,0.33)。

Abstract

Rare earth ion doped phosphors have attracted great interest during the past several decades due to their unique physical and chemical properties. Among these rare earth ions, the Eu3+ ion can emit red fluorescence centered at around 613 nm, corresponding to the 5D0→7F2 transition. Thus many Eu3+-doped materials can be used as red phosphors for white LEDs.In this paper, the Eu3+ and Sm3+ co-doped CaMoO4 red phosphors were synthesized using a coprecipitation method. The effect of Sm3+ doping on structural and luminescent properties of CaMoO4∶Eu3+ red phosphors were studied. The results indicate that the particle size of the samples decrease with Sm3+ doping concentration. The excitation intensity at around 405 nm and emission intensity at around 613 nm of Eu3+ increased after the introduction of Sm3+ ions. When the mole fraction of Sm3+ is 5%, the emission intensity of red light is the strongest. In addition, the chromaticity coordinates for CaMoO4∶0.1Eu3+ and CaMoO4∶0.1Eu3+，0.05Sm3+ phosphors are (0.661,0.329) and (0.667,0.328), respectively. The chromaticity coordinates of CaMoO4∶0.1Eu3+，0.05Sm3+ phosphors is closer to the Commission International del Eclairage (CIE) chromaticity coordinates(0.67,0.33). In conclusion, the Eu3+ and Sm3+ co-doped CaMoO4 is a high performance red phosphor and has a potential application in white light emitting diodes.

参考文献

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丁洪岩, 孙江亭, 刘威, 孟庆裕, 吕树臣. Sm³⁺掺杂对CaMoO₄∶Eu³⁺红色荧光粉结构和发光性质的影响[J]. 发光学报, 2011, 32(5): 456. DING Hong-yan, SUN Jiang-ting, LIU Wei, MENG Qing-yu, LV Shu-chen. Effect of Sm³⁺ Doping on Structural and Luminescent Properties of CaMoO₄∶Eu³⁺ Red Phosphors[J]. Chinese Journal of Luminescence, 2011, 32(5): 456.

Sm³⁺掺杂对CaMoO₄∶Eu³⁺红色荧光粉结构和发光性质的影响

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