白光LED用荧光材料Ba3Gd(BO3)3∶Eu^(3＋)的发光性能研究  

Luminescent Properties of Ba_3Gd(BO_3)_3∶Eu^(3+) Phosphor for White LED Applications

作　　者：周立亚[1] 黄君丽[1] 易灵红[1] 龚孟濂[2] 石建新[2] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]中山大学化学与化学工程学院,广东广州510275

出　　处：《中国稀土学报》2009年第1期31-35,共5页Journal of the Chinese Society of Rare Earths

基　　金：广西科学基金资助项目(桂科基0731014);广西大型仪器协作共用网资助

摘　　要：用高温固相反应法制备了稀土离子Eu3+掺杂的三元稀土硼酸盐Ba3Gd(BO3)3发光材料,通过X射线衍射(XRD)、荧光光谱和扫描电镜(SEM)等测试手段对Ba3Gd(BO3)3∶Eu3+荧光粉的制备条件、发光性能以及形貌进行了研究。XRD结果表明,在1000℃时可得到Ba3Gd(BO3)3纯相。扫描电镜照片显示颗粒基本为球形,粒径约为200~400 nm。发光光谱测试表明,Ba3Gd(BO3)3∶Eu3+荧光粉在近紫外区(UV)(396 nm)和蓝光区(466 nm)可以被有效地激发,分别用255和396 nm的紫外光激发样品时,以Eu3+的5D0-7F2(611和616 nm)超灵敏跃迁为主要发射峰。当Eu3+的掺杂浓度为10%(摩尔分数)时,Ba3Gd(BO3)3∶Eu3+在611和616 nm处的发光强度最大。因此,这种荧光粉是一种可能应用在白光LED上的红色荧光材料。Luminescent material Ba3 Gd （BO3）3 doped with Eu^3＋ ion was prepared by high-temperature solid state reaction. The preparing conditions, luminescent properties and particle morphology of Ba3 Gd （BO3）3： Eu^3＋ phosphor were studied by X-ray diffraction （XRD） , fluorescence spectroscopy and scan electron microscopy （SEM）, respectively. XRD results showed that the pure phase of Ba3Gd （BO3 ）3 was available at 1000 ℃. SEM images displayed that the particles of Ba3 Gd （BO3）3 ： Eu^3＋ phosphor basically had spherical shape with an average diameter about 200- 400 nm. The luminescence spectra showed that Ba3 Gd （BO3）3 ： Eu^3＋ could be effectively excited in near ultraviolet （UV） region （396 nm） and blue region （466 nm）. The main emission peaks of Ba3Gd （BO3） 3 ：Eu^3＋ could be assigned to the super-sensitive transition ^5D0-^7 F2 （611 and 616 nm） of Eu^3＋ ion when samples were excited at 255 and 396 nm, respectively, and the luminescent intensity of Eu^3＋ ion at 611 and 616 nm reached to the maximum when the doped content of Eu^3＋ ion was 10%. Therefore, this phosphor could be a promising red component for possible applications in the white LED.

关 键 词：Ba3Gd(BO3)3 荧光粉 发光 稀土 

分 类 号：O614.33[理学—无机化学]