新型橙红色荧光粉Sr_(4)Nb_(2)O_(9):Sm^(3+)的光致发光性能研究  

Photoluminescence Properties of a New Orange-Red Phosphor Sr_(4)Nb_(2)O_(9):Sm^(3+)

作　　者：孟宪国 周琼[1] 许英朝 刘春辉 杨伟斌[1] 林翔宇 王嘉伟 Meng Xianguo;Zhou Qiong;Xu Yingchao;Liu Chunhui;Yang Weibin;Lin Xiangyu;Wang Jiawei(School of Optoelectronics and Communication Engineering,Xiamen University of Technology,Xiamen 361024,China;Fujian Provincial Key Laboratory of Optoelectronic Technolo-gy and Devices,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]厦门理工学院光电与通信工程学院,福建厦门361024 [2]厦门理工学院福建省光电技术与器件重点实验室,福建厦门361024

出　　处：《中国稀土学报》2023年第2期272-278,共7页Journal of the Chinese Society of Rare Earths

基　　金：福建省自然科学基金面上项目(2019J01876);厦门市科技计划重大项目(3502ZCQ20191002);厦门理工学院科研攀登计划项目(XPDKT20009)资助。

摘　　要：采用高温固相法制备了一系列新型Sr_(4-x)Nb_(2)O_(9):xSm^(3+)橙红色荧光粉,对Sr_(4-x)Nb_(2)O_(9):xSm^(3+)的物相结构、光致发光性能、荧光衰减、热稳定性等进行了研究。结果表明,Sr_(4-x)Nb_(2)O_(9):xSm^(3+)橙红色荧光粉能被近紫外和蓝光有效激发,并在607 nm处呈现出较强的橙红光发射带。研究了样品的浓度猝灭机制,样品的最佳掺杂浓度为0.02,其浓度猝灭归因于Sm^(3+)离子间的电偶极间相互作用。此外,还探讨了Sr_(3.98)Nb_(2)O_(9):0.02Sm^(3+)样品的热稳定性,在453 K时的发光强度大约为室温下的89.6%。最后对样品的荧光寿命和CIE进行了测试,随着Sm^(3+)掺杂浓度提高,荧光寿命不断变短;所有样品的相关色温较低,具有较高的色纯度。上述结果表明,Sm^(3+)掺杂Sr_(4)Nb_(2)O_(9)的橙红色荧光粉在固态照明领域中具有潜在的应用前景。A series of new orange-red phosphors of Sr_(4-x)Nb_(2)O_(9):xSm^(3+)were synthesized via the high temperature solid state method.The phase structure,photoluminescence and fluorescence decay curves,and thermal stability were used to characterize the phosphors.The results show that Sr_(4-x)Nb_(2)O_(9):xSm^(3+)phosphors can be effectively excited by near ultraviolet and blue light,and exhibit a strong orange-red light emission band at 607 nm.The concentration quenching mechanism of the samples was studied.And the optimum doping concentration was 0.02.Concentration quenching of photoluminescence in Sr_(4-x)Nb_(2)O_(9):xSm^(3+)is attributed to the interaction between the electric dipoles of Sm^(3+)ions.In addition,the thermal stability of the Sr_(3.98)Nb_(2)O_(9):0.02Sm^(3+)sample is also discussed.The luminescence intensity at 453 K is approximately 89.6%of that at room temperature.Finally,the fluorescence lifetime and CIE of the sample were investigated.It is found that the fluorescence lifetime decreases with the increase of doping concentration of Sm^(3+).All samples have the characteristics of low correlated color temperature and high color purity.The results indicate that Sm^(3+)doped Sr_(4)Nb_(2)O_(9)orange-red phosphor has potential application prospects in the field of solid-state lighting.

关 键 词：高温固相法 Sr_(4)Nb_(2)O_(9):Sm^(3+) 橙红色荧光粉 光致发光 白光LED 稀土 

分 类 号：O614.33[理学—无机化学]