新型彩色长余辉材料的制备及其发光性能的研究

Preparation and photoluminescence properties of a series of new colorized long afterglow materials

将红色染料罗丹明B与绿色长余辉材料混配间接获得可被可见光激发的橙红色长余辉材料,并在此基础上根据三基色原理得到了一系列彩色长余辉发光材料,同时对其发光性能进行了系统研究。通过对材料的余辉谱以及余辉曲线分析,发现随着加入的蓝、绿色长余辉材料与罗丹明B相对浓度的变化,其位于510和580nm左右的余辉光谱特征峰分别发生一定的蓝移和红移,余辉强度及颜色也出现规律性变化。随着罗丹明浓度的增加,样品整体亮度减弱,但罗丹明红色特征发射峰相对增强。

A red long afterglow material which can be excited by visible light was prepared indirectly using red dye rhodamine B which was mixed with the green long afterglow materials and could be excited by its afterglow.A series of colorized luminescent materials were prepared according to the trichromatic color theory.The afterglow spectra and the afterglow decay curves of these materials showed that with the changes of mixing ratios of the phosphors and dyes,the two characteristic peaks at about 510nm and 580nm have a little blue shift and red shift respectively,afterglow strength and color also have a regular variation.With the increase of rhodamine＇s concentration,the samples＇ overall brightness reduced,but the intensity of rhodamine＇s red characteristic emission peak increased.