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以LED红色荧光粉材料、近红外下转换材料和上转换生物荧光标记材料为主线,结合我们实验室近期具体的相关研究工作,对稀土掺杂的光谱转换材料及其潜在的应用前景进行了简要介绍.在LED红色荧光粉材料方面,以Eu3+掺杂的红色荧光材料为对象,研究通过基质或掺杂敏化剂到Eu3+的能量传递来提高材料在近紫外波段的激发效率,并且在Y2MoO6材料中通过基质的电荷迁移带到Eu3+的能量传递在395nm的近紫外激发条件下获得了2.3倍于商用LED荧光粉(Y2O2S:Eu3+)的发光强度.在近红外下转换材料方面,分别研究了通过从其他稀土离子到Yb3+的逐次能量传递和从基质到Yb3+的合作能量传递实现近红外下转换,主要介绍了两种典型材料中的能量传递机理,氟化物中Ho3+到Yb3+的逐次能量传递和YVO4中VO43-到Yb3+的合作能量传递.在上转换生物荧光标记材料方面,利用以油酸/十八烯为溶剂的湿化学法合成了单分散、粒径在20nm左右、具有核/壳结构和水溶性的球形NaYF4:Yb3+,Er3+(Tm3+)纳米粒子,并对其在不同环境中的稳定性和在细胞中的荧光成像性质做了研究,在此基础上还对下一步可能的深化研究进行了探讨.不断拓展的研究方向和层出不穷的研究结果表明稀土掺杂的光谱转换材料是新型功能材料的重要研究领域,目前和将来在生物和化学传感、节能环保和新能源等领域有着重要的应用或应用前景,需要深入研究.
Taking LED red phosphor material, near-infrared under-conversion material and up-conversion biofluorescent labeling material as the main line, the rare earth-doped spectral conversion material and its potential application prospects are briefly summarized according to the recent related research work in our laboratory In the LED red phosphor material, Eu3 + -doped red fluorescent material is used as an object to study the energy transfer in the near ultraviolet region by the energy transfer of the matrix or doped sensitizer to Eu3 +, and the excitation efficiency of the material in the Y2MoO6 material , The energy transfer to the Eu3 + by the charge transfer of the matrix was 2.3 times that of the commercial LED phosphor (Y2O2S: Eu3 +) at near UV excitation at 395 nm. In the near infrared conversion material, The successive energy transfer from other rare earth ions to Yb3 + and the cooperative energy transfer from matrix to Yb3 + are carried out. The energy transfer mechanism in two typical materials, the successive energy transfer from Ho3 + to Yb3 + in fluoride, and the YVO4 The cooperative energy transfer of VO43- to Yb3 + was studied.In the upconversion bioluminescent marker material, Syntheses of spherical NaYF4: Yb3 +, Er3 + (Tm3 +) nanoparticles with monodispersion and particle size of about 20 nm with core / shell structure and water solubility were studied. Their stability in different environments and fluorescence in cells Imaging properties were studied, and on the basis of this, the possible further deepening research was also discussed.Recent research directions and endless research results show that rare earth doped spectral conversion material is an important research field of new functional materials, and at present And future applications and prospects in biological and chemical sensing, energy saving and environmental protection, and new energy fields, which require further study.