近紫外白光LED用YVO_(4)基红色荧光粉的合成与性能研究  

Synthesis and properties of YVO_4-based red phosphors for near-ultraviolet white LED

作　　者：唐鹿[1] Tang Lu(The Center of Collaboration and Innovation,Jiangxi University of Technology,Nanchang 330098)

机构地区：[1]江西科技学院协同创新中心,南昌330098

出　　处：《化工新型材料》2025年第3期132-136,共5页New Chemical Materials

基　　金：江西省教育厅科学技术研究项目(GJJ190991);江西科技学院科研启动费资助项目(江科发[2015]66号)。

摘　　要：YVO_(4)晶体是一种优异的无机基质材料,能高效地吸收短波长的紫外光能量并有效地传递给Eu^(3+),因而YVO_(4)∶Eu^(3+)荧光粉在短波长的紫外光激发下具有良好的红光发射性能。但YVO_(4)∶Eu^(3+)荧光粉不能有效地被长波长的近紫外光激发。为了获得能被近紫外芯片(350~410nm)有效激发的YVO_(4)基红色荧光粉,以有强近紫外光吸收能力的2-噻吩甲酰三氟丙酮(TTA)有机配体为Eu^(3+)的敏化剂,通过溶剂热和离子交换二步实验法,成功地合成了YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA荧光粉。实验表明,在TTA有机配体的敏化作用下,YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA荧光粉的激发峰被明显的宽化,使得350~410nm的近紫外光能被有效地吸收。在373nm的近紫外光激发下,YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA荧光粉实现了明亮的红光发射。YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA荧光粉具有良好的近紫外激发性能和红光发射性能,是一种有望应用于近紫外白光LED的红色荧光粉。YVO_(4) crystals are a kind of excellent inorganic matrix materials that can efficiently absorb short-wavelength ultraviolet light energy and effectively transfer it to Eu^(3+),so YVO_(4)∶Eu^(3+) phosphors have good red emission performance under short-wavelength ultraviolet excitation.However,YVO_(4)∶Eu^(3+) phosphors cannot be efficiently excited by long-wavelength near-ultraviolet light.In order to obtain YVO_(4)-based red phosphors that can be effectively excited by near-ultraviolet chip(350~410nm),YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA phosphors were synthesized by solvothermal and ions exchange two-step experimental methods using 2-thenoyltrifluoroacetone(TTA) organic ligand with strong near-ultraviolet light absorption ability as the sensitizer of Eu^(3+).The results showed that the excitation peaks of YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA phosphors were obviously widened under the sensitization of TTA organic ligand,which enabled the near-ultraviolet light of 350~410nm to be effectively absorbed.The YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA phosphors achieved bright red emission under the excitation of near-ultraviolet light at 373nm.The YVO_(4)∶Eu^(3+)∶Eu^(3+)-TTA phosphors demonstrated excellent near-ultraviolet excitation and red emission properties,making them promising red phosphors for near-ultraviolet white LED.

关 键 词：白光LED 近紫外光 YVO_(4)∶Eu^(3+) 红色荧光粉 TTA有机配体 

分 类 号：O482.31[理学—固体物理]