Eu^3＋掺杂Y2O3单分散红色荧光球形颗粒的尺寸可控合成与荧光性能  

Eu^(3+) Activated Y_2O_3 Red Phosphor Monospheres: Size-controlled Processing and Luminescence Property

作　　者：曲姣[1,2] 朱琦[2] 李继光[2] 孙旭东[2] QU Jiao ZHU Qi Li Ji-Guang SUN Xu-Dong(College of Mechanical and Vehicle Engineering, Shenyang Institute of Technology, Fushun 113122, China Key Labora- tory for Anisotropy and Texture of Materials （Ministry of Education）, School of Materials Science and Engineering, Northeast- em University, Shenyang 110819, China)

机构地区：[1]沈阳工学院机械与运载学院,抚顺113122 [2]东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,沈阳110819

出　　处：《无机材料学报》2016年第10期1087-1093,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(51172038,51302032);中央高校基本科研业务费资助项目(N140204002)~~

摘　　要：结合籽晶法和添加矿化剂硝酸铵,通过均相沉淀合成和后续煅烧实现了(Y,Eu)_2O_3单分散球形颗粒(直径范围110~550 nm)的可控合成。通过XRD、FE-SEM、TEM和PLE/PL分析等手段对产物进行了系统表征。发现采用籽晶法和添加矿化剂硝酸铵可以促进球形颗粒长大。碱式碳酸盐前驱体经600℃煅烧分解为立方晶(Y,Eu)_2O_3,且经1000℃煅烧后(Y,Eu)_2O_3依然继承球形形貌特征。所得多晶(Y,Eu)_2O_3球形荧光颗粒在242 nm激发下于615 nm处呈现最强红色荧光发射(Eu^(3+)的~5D_0→~7F_2跃迁)。荧光粉的荧光性能呈现明显的尺寸依存性。增大球形颗粒尺寸减小了荧光寿命(1.15~1.57 ms)和荧光不对称因子[I(~5D_0→~7F_2)/I(~5D_0→~7F_1)],但增强了荧光发射强度。Monodispersed （Y, Eu）203 spheres （110-550 nm in diameter） were calcined from precursors i synthesized via homogeneous precipitation. Systematic characterizations of the products were carried out by XRD, FE-SEM, TEM, and PLE/PL analyses. Large spherical particles were resulted via seeded growth and NH4NO3 addition. Cal- cining the basic carbonate precursor at 600℃ yielded cubic （Y, Eu）2O3. The spherical shape and excellent disper- sion of the precursor particles were largely retained to the oxides after annealing up to 1000℃. The polycrystalline （Y, Eu）203 spheres exhibited typical red emission at 615 nm （the 5D0→7F2 transition of Eu^3＋） under UV excitation at 242 nm. The phosphors showed a substantially size-dependent luminescent behavior. Shorter fluorescence lifetime （1.15-1.57 ms）, decreased asymmetry factor （I（5Do→TF2）/I（5Do→7F1）） of luminescence, and enhanced luminescent intensity were observed along with increasing particle size.

关 键 词：单分散球 尺寸可控合成 荧光性能 氧化钇 

分 类 号：TB34[一般工业技术—材料科学与工程]