荧光染料太阳能聚集器的研究

基于对荧光式太阳能聚光器能量转换效率的分析,取用了荧光量子产率高的若丹明染料和苝红类颜料作为荧光物质,并制成了太阳能聚集器,进而讨论了它们的浓度效应、自吸收及光稳定性等。结果是:随着荧光染料浓度增加,其Stokes位移相应增大,因而自吸收现象明显降低;但在高浓度下由于分子间碰撞而引起的荧光猝灭将导致荧光量子产率下降。苝红颜料分散在聚甲基丙烯酸甲酯中的量子产率比分散在DMF溶液中高,它具有优于若丹明的良好的光稳定性。

Study on Luminescent Solar Concentrators of Fluoresent Dyes

On the basis of the analysis of energy conversion efficiency of luminescent solar concentrators, the fluorescent dyes, Rhodamine and Perylene red, which have higher quantum yield fluorescence, were adopted as fluorescent materials. The concentration effects, the self-absorption of dye, the pholostability etc. were discussed. These experiments show that the Stokes shifts increase as the concentration of dyes increase, and therefore the selfabsorptions of dyes decrease. At higher concentrations of dyes, the quantum yield decrease, induced by self-quenching of fluorescence. The Photostability of Perylene red is better than that of Rhodamine.