Feng Xiaohui, Meng Qingyu, Chen Baojiu, Lu Shuchen, Sun Jiangting, Ding Hongyan
Heilongjiang Key Laboratory Low Dimensional Mesoscopic Physics, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, P. R. China.
J Nanosci Nanotechnol. 2011 Nov;11(11):9780-6. doi: 10.1166/jnn.2011.5272.
In this paper, a novel nanophosphor, Y10W2O21:Eu, was synthesized through co-precipitation which is a simple and low-costing method. The structure and morphology of the nanocrystal samples were characterized by using XRD and FE-SEM. The emission spectra, excitation spectra and fluorescence decay curves were measured. J-O parameters, quantum efficiencies of Eu3+ 5D0 energy level, color coordinates and Huang-Rhys factor of Y10W2O21:Eu nanophosphors were calculated. The results indicate that EU3+ 5D0-7F2 red luminescence at 610 nm can be effectively excited by 394 nm near-UV light and 464 nm blue light in Y10W2O21 host, which is similar to the familiar Eu3+ doped tungstate phosphors (e.g., Gd2(WO4)3:Eu, CaWO4:Eu). Besides, compared with the other types of tungstate phosphors, a less expensive tungsten was used, which can effectively reduce cost. Therefore, the Y10W2O21:Eu red nanophosphors may have a potential application for white LED.
