化学共沉淀法合成YAG∶Eu^(3+)红色荧光粉及其光致发光性质  

Photoluminescent Properties of YAG∶Eu^(3+) Red Phosphor Synthesized by Coprecipitation Method

作　　者：黎学明[1] 向星[1] 杨文静[1] 李武林[1] 孔令峰[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《半导体光电》2010年第1期71-74,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(10476035);重庆市自然科学基金重点资助项目(2005BA4016)

摘　　要：采用化学共沉淀法合成YAG∶Eu3+红色荧光粉,利用XRD、荧光光谱和激光粒度仪等表征荧光粉晶体结构、光致发光、粒径分布等。结果表明,当煅烧温度为1000℃时,荧光粉YAG晶相趋于稳定,无中间相的形成,合成温度比传统高温固相法降低近500℃;随着煅烧温度升高,荧光粉光致发光峰强度增大,但峰值波长并不随煅烧温度升高而发生移动;前驱体中添加表面活性剂PEG后,荧光粉粒径为1.3μm左右,且粒径分布范围窄;助熔剂NaF能够显著提高荧光粉的光致发光强度,但过量则会出现浓度猝灭,其最佳添加量为4%。YAG ： Eu3＋ red phosphor powders with good photoluminescence performance were synthesized by chemical co-precipitation method. The crystal structures, luminescence and particle size distribution properties were characterized by means of XRD, fluorescence spectrometer and laser particle size analyzer. The result shows that YAG crystal phase forms and tends to be stable without when the calcination temperature is 1 000℃. Compared with traditional high temperature solid-state method, the synthesis temperature is nearly reduced by 500℃. With the increase of calcination temperature increasing, photoluminescence peak intensity of YAG ： Eu3＋ red phosphor powders strengthens and the peak wavelength does not shift. After adding surfactant PEG to the precursors, the particle size distribution range becomes narrow and the particle size reduces to be 1.3μm. Adding the flux NaF can strengthen the photoluminescence peak intensity of YAG ： Eua＋ red phosphor powders, but an excessive flux will cause concentration quenching. The optimal flux NaF content is 4%.

关 键 词：化学共沉淀 YAG:Eu^3+ 荧光粉 

分 类 号：O611.4[理学—无机化学]