Effect of Trisodium Citrate on the Morphology and Luminescence Properties of Hydrothermally Synthesized YVO4 Phosphor
Sa Zhang a, Yan Liang b and Xiaoyong Gaoa
aSchool of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China
bCollege of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
Received: March 12, 2015; In final form: December 24, 2015
Full Text PDF
YVO4 phosphors with different morphologies were synthesized by trisodium citrate (Na3cit) surfactant-assisted hydrothermal process. Effects of molar ratio of cit3- to Y3+ and pH value of reaction solution were intensively investigated on the morphologies, structures and luminescence properties of YVO4 phosphor. The morphologies of the YVO4 particles can be effectively controlled in strong acidic and strong alkaline environment by affecting the adsorption of cit3- on the (001) crystal plane of YVO4. Strong acidic condition resulted into excessive adsorption of cit3- groups on the YVO4 phosphor, which annihilated the superior luminescence of YVO4 phosphors. On the contrary, strong alkaline condition does not result into the adsorption of cit3- groups. The synthesized YVO4 phosphor without adsorption of cit3- groups showed superior luminescence even though the effective control of the morphology in alkaline condition is not so good as in strong acidic condition.

DOI: 10.12693/APhysPolA.129.79
PACS numbers: 78.55.-m, 61.05.cp, 68.37.Hk, 78.30.-j