液晶分子在有机太阳能电池中的应用研究进展

Research Progress of Liquid Crystal Molecules for Application in Organic Solar Cells

液晶分子应用于有机太阳能电池器件是近年来光电领域的研究热点之一。液晶分子是一类兼具晶体和液体性质的功能性软材料,且具有较强的自组装特性。利用液晶分子的光吸收互补可有效调控有机太阳能电池的光吸收范围。此外,液晶分子具有强结晶性,能诱导活性层分子自组装提高其有序性,同时能提高分子结晶性能,从而提高活性层电荷迁移率,最终提高有机太阳能电池器件的短路电流和填充因子。因此,本文从液晶分子在活性层组分中发挥的作用出发,综述了其分别作为有机太阳能电池活性层材料和添加剂的研究进展。最后,对液晶分子在有机太阳能电池应用过程中存在的问题及今后的发展进行了总结和展望。

Application of liquid crystal molecules in organic solar cell(OSC)device is one of the research focuses in the optoelectronic field in recent years.Liquid crystal molecules are a kind of functional soft materials with both crystal and liquid properties,and have strong self-assembly characteristics.The light absorption range of OSCs can be effectively controlled by using the light absorption complementarity of liquid crystal molecules.In addition,the liquid crystal molecules have strong crystallinity,which can induce the self-assembly of active layer molecules to enhance their order,and at the same time improve the molecular crystallization performance,thereby increasing the charge mobility of active layer,and ultimately increasing the short-circuit current(J;)and fill factor(FF)of the OSC devices.Therefore,this paper,which starts from the role of liquid molecules in active layer components,reviews the application of liquid crystal molecules as active layer materials and additives for OSCs.Finally,the existing problems and future development of liquid crystal molecules in the application of OSCs are summarized and prospected.