稀土发光材料Eu（2mCND）4CTAC及薄膜的耐老化性能研究

The Study of Anti-aging Properties of Rare Earth Eu3+ Complex and Light Conversion Film

下转换发光材料稀土铕配合物Eu（2mCND）4CTAC可以有效的将紫外光转换为可见光,将稀土发光材料和有机薄膜载体结合并负载于电池表面后,晶硅太阳能电池的光电转换效率得到了显著提高。光转换薄膜在户外使用时存在着一定的老化现象,这不仅严重影响到光转换薄膜的使用寿命,甚至可能对晶硅电池产生负面效应而造成巨大的经济损失。研究了将Eu^3＋配合物与PMMA薄膜载体相结合后制备了五种浓度的光转换薄膜,并对光转换材料和光转换薄膜进行了紫外箱加速老化和户外老化实验。实验表明,稀土发光材料的老化性能优良,在5000小时加速老化或1.5年的户外老化后量子产率不变;Eu^3＋配合物浓度为1%的薄膜老化性能最好,初始量子产率最高且在老化一段时间后量子产率趋于稳定;光转换薄膜的室内加速老化和户外老化存在一定的时间对应关系。本次研究系统评价了光转换材料和薄膜的老化性能,对预测光转换薄膜的使用寿命具有一定的指导意义。

Down-conversion luminescent complexes Eu（2mCND）_4CTAC can effectively convert ultraviolet light into visible light. Light conversion film containing such luminescent material can significantly improve the photoelectric conversion efficiency of crystal silicon solar battery once loaded on the surface of the battery. While there is an aging phenomenon in the outdoor use of light conversion film,which not only affects the life of the film,but may even have a negative effect on the crystalline silicon cell,which causes huge economic loss. In this study,five films with different concentrations were prepared by combining Eu^3＋ complex with PMMA film carrier,then indoor and outdoor aging experiments were carried out for the films and luminescent material. The test shows that the luminescent has good anti-aging properties. After 5000 hours of accelerated aging or 1. 5 years of outdoor aging,the quantum yield of such complex remained constant. It also indicates that anti-aging properties of PMMA film is the best when the content of Eu^3＋ complexes is 1%. The initial quantum yield of the luminescent material is the highest and then tend to be stable after aging for some time. In addition,there is a certain time correlation between the accelerated aging and outdoor aging experiment of the light conversion film. This research systematically evaluates the anti-aging properties of light conversion materials and films,which has a certain guiding significance for predicting the service life of light conversion films.