作　　者： (赵景川）; (焦宝祥）; (刘银）; (田浩）; (胡聪）;

机构地区： School of Materials Science and Engineering, Yancheng Institute of Technology

出　　处： 《结构化学》

摘　　要： A series of red emitting ZnTiO3 phosphors co-doped with Eu3+ and alkali metal ions（Li+, Na+ and K+） was prepared by sol-gel method. The crystal structure of the phosphors was investigated by using X-ray diffraction（XRD） and transmission electron microscopy（TEM） after annealing at 700 ℃. The results show that the crystal structure belongs to the hexagonal phase of ZnTiO3 with space group R-3:R. The influence of site occupancy of different alkali metal ions on the emission of ZnTiO3:Eu3+ phosphors was investigated in detail. The emission intensity was significantly enhanced by introducing alkali metal ions. In contrast to Eu3+ singly doped ZnTiO3, the red emission intensities of ZnTiO3:Eu3+ with 4 mol% alkali metal ions（Li+, Na+, K+） were enhanced by about 2.1, 1.7 and 1.4 times, respectively. In addition, the Commission Internationale Ed I’eclairage（CIE） chromaticity coordinates of ZnTiO3:Eu3+, Li+（0.672, 0.328） are quite similar to the National Television Standard Committee（NTSC） standard values for the red（0.670, 0.380）.

分 类 号： [TQ422]