BaWO4:Sm^3+红色荧光粉的微波合成及发光性能研究  

Preparation of BaWO4:Sm^3+Red Phosphor by Microwave Method and Its Luminescent Properties

作　　者：李兆 曹静 王永锋 Li Zhao;Cao Jing;Wang Yongfeng(School of Materials Engineering,Xi'an Aeronautical University,Xi'an 710077,China)

机构地区：[1]西安航空学院材料工程学院,陕西西安710077

出　　处：《中国稀土学报》2020年第2期139-143,共5页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51474170,21205092);国家高技术研究发展计划863项目(2011AA05A202)资助。

摘　　要：以WO3和BaCO3为原料,采用微波法成功合成出白光LED用类球形BaWO4基质粉体,制备了Sm^3+掺杂的BaWO4红色荧光材料。通过X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)和荧光光谱(PL)等测试手段对BaWO4:Sm^3+荧光粉的物相、微观形貌和发光性能进行表征。结果表明:微波功率700 W,反应15 min,MnO2为微波吸收剂时合成出类球形BaWO4:Sm^3+粉体。BaWO4:Sm^3+荧光粉激发峰位于405和480 nm,样品可被UV-LED及蓝光激发产生位于650 nm的红光发射。经Li^+电荷补偿后BaWO4:Sm^3+荧光粉的发射峰强度明显增强。BaWO4:Sm^3+是一种潜在的近紫外及蓝光激发白光发光二极管用红色荧光粉。BaWO4 powder with spherical particles for white light-emitting diodes(LED)was synthesized by microwave method using tungsten(Ⅵ)oxide and barium carbonate as raw materials.Subsequently,red BaWO4 phosphors doped by Sm3+were prepared.The crystal structure and photoluminescent properties were characterized with X-ray diffraction(XRD),field environmental scanning electron microscopy(FESEM),and photoluminescence(PL)spectroscopy.The results indicated that BaWO4:Sm^3+with regular spherical particles could be obtained at 700 W for 15 min.The main excitation peaks is located at 405 and 480 nm.The main emission peak is located at 650 nm.BaWO4:Sm3+phosphor is obviously enhanced after Li^+charge compensation.The results indicated that BaWO4:Sm^3+red phosphors acted as excellent candidates for white LED.

关 键 词：白光LED BaWO4:Sm^3+ 光致发光 微波合成 

分 类 号：O614.33[理学—无机化学]