A novel synthetic route to Y2O3:Tb3+ phosphors by bicontinuous cubic phase process

作者：Chien Wen Chen^*; Yu Yang Yen; Yang Chun Chen

来源：Materials & Design, 2010, 31(4): 1737-1741.

DOI：10.1016/j.matdes.2009.01.046

This study applies a novel approach to prepare the terbium-doped yttrium oxide phosphors (Y2O3:Tb3+) using the bicontinuous cubic phase (BCP) process. The experimental results show that the prepared precursor powder was amorphous yttrium hydroxide Y1-xTbx(OH)(3) with a spherical shape and primary size 30-50 nm. High crystallinity phosphors with body-centered cubic structures were obtained after heat treatment above 700 degrees C for 4 h. The primary size of the phosphors grew to 100-200 nm, and dense agglomerates with a size below 1 mu m were formed during the calcination. The obtained Y2O3:Tb3+ phosphor had a strong green emitting at 542 nm. The optimum Tb3+ concentration was 1 mol% to obtain the highest PL intensity. This study indicates that the calcining temperature of 700 degrees C needed for high luminescence efficiency in this work is much lower than 1000 degrees C or above needed for the conventional solid-state method.

• 出版日期2010-4