Sr2CeO4 : Eu3+ and Sr2CeO4 : 5 mol% Eu3+, 3 mol% Dy3+ microphosphors: Wet chemistry synthesis from hybrid precursor and photoluminescence properties

摘要

In this article, Sr2CeO4:xmol% Eu3+ and Sr2CeO4:5 mol % Eu3+, 3 mol% Dy3+ phosphors were synthesized from assembling hybrid precursors by wet chemical method. As-prepared samples present uniform grain-like morphology and the particle size is about 0.2 mu m. The luminescence spectra of Sr2CeO4:x mol % Eu3+ have been measured to examine the influence of the intensity of red emission lines for Eu3+ on the concentration of Eu3+, showing that the intensity of the red emission increases with an increase of the concentration from 1 to 5 mol%. Additionally, from the emission spectra of Sr2CeO4:5 mol% Eu3+, 3 mol% Dy3+ phosphors, the characteristic lines of Dy3+ have also been observed. This result indicates that there also exists an energy transfer process between Sr2CeO4 and Dy3+. (C) 2007 Elsevier Ltd. All rights reserved.