CAJ | 학술논문

采用高温固相方法合成了YVO_4 ·xTiO_2:Eu~(3+)(x=0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9)粉末状发光材料,经X射线衍射分析结构发现材料为两相共存.一相为YVO_4,属四方锆英石结构;另一相为Y_2Ti_2O_7,属立方烧绿石结构.研究了YVO_4 ·xTiO_2:Eu~(3+)在UV及VUV激发下的光谱性质,讨论了Ti 的掺杂对材料发光性能的影响,发现适量的Ti的掺入可以提高材料基质对UV及VUV的吸收.在UV及VUV激发下,YVO_4·xTiO_2:Eu~(3+)荧光粉的发射光谱主峰在616 nm和619 nm,证明Eu~(3+)占据了晶格中非反演对称中心的位置.在YVO_4 ·xTiO_2:Eu~(3+)的激发光谱中,有一中心位于155 nm的吸收带,它属于基质的吸收带.
채용고온고상방법합성료YVO_4 ·xTiO_2:Eu~(3+)(x=0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9)분말상발광재료,경X사선연사분석결구발현재료위량상공존.일상위YVO_4,속사방고영석결구;령일상위Y_2Ti_2O_7,속립방소록석결구.연구료YVO_4 ·xTiO_2:Eu~(3+)재UV급VUV격발하적광보성질,토론료Ti 적참잡대재료발광성능적영향,발현괄량적Ti적참입가이제고재료기질대UV급VUV적흡수.재UV급VUV격발하,YVO_4·xTiO_2:Eu~(3+)형광분적발사광보주봉재616 nm화619 nm,증명Eu~(3+)점거료정격중비반연대칭중심적위치.재YVO_4 ·xTiO_2:Eu~(3+)적격발광보중,유일중심위우155 nm적흡수대,타속우기질적흡수대.
The samples of YVO_4·xTiO_2:Eu~(3+)(x=0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9) were synthesized by the conventional solid state reaction. The structure of prepared sample was measured by X-ray diffraction(XRD) at room temperature. XRD measurements confirmed that the prepared YVO_4 ·xTiO_2:Eu~(3+) is consisted of two phases. One phase is YVO_4 with the tetragonal according to JCPDS-Card (42-0413), the other phase is Y_2Ti_2O_7 with the cubic pyrochlore according to JCPDS-Card (17-0341). Spectroscopic properties of the sample were studied under the UV/VUV excitation. The effects of Ti doping on the luminescent properties of the sample were investigated and it was found that reasonable Ti doping can highlight the absorption of matrix in UV/VUV rang. The emission spectrum is dominated by the red peaks at 616 nm and 619 nm due to the electric dipole transition ~5D_0→~7F_2 of Eu~(3+). It indicated that Eu~(3+) occupies a site lacking inversion symmetry. There is one band peaked at 155 nm in the excitation spectrum of the sample, it could be assigned to the absorption of the host.