采用亲水性聚合物阴极界面层的聚合物太阳电池

Using Hydrophilic Polymer as Cathode Interlayer for Polymer Solar Cells

聚合物太阳电池由于具有质量轻、柔性好、生产成本低和可能实现大面积加工的独特优势,而受到国内外学者广泛的关注,成为研究的热点。聚合物太阳电池的性能强烈依赖于活性层和界面层的性能,其中可以通过改变界面层材料的结构和调节界面层的加工工艺等方法使光伏性能得到优化。近来,亲水性聚合物作为阴极界面层实现高性能有机光电器件表现出了独特的优势和巨大的潜力。重点介绍了采用亲水性聚合物作为阴极界面层提升聚合物太阳电池性能的最新进展。引入亲水聚合物可以调节多种阴极材料的功函数来增强电子收集,对于正装和倒装两种器件结构的聚合物太阳电池,都可以提升开路电压、短路电流、填充因子3个电池参数,而显著提高聚合物太阳电池的效率。

Polymer solar cells with the unique advantages of light weight,flexibility,low cost,and good potential of large-area fabrication,are widely focused and researched by scientists and engineers in the worldwide. The photovoltaic performances of polymer solar cells strongly depend on the performance of active layer and resulting interlayers. The interlayer performance can be optimized by various ways,for example,adjusting the chemical structures of interfacial materials,and improving the fabrication process of interlayer. Recently,hydrophilic polymers as cathode interlayer show special superiority and huge potential for highly efficient organic optoelectronic devices. In this paper,the recent advances in the modifications of polymer solar cells with hydrophilic polymers as cathode interlayer were introduced. The insertion of a hydrophilic polymer interlayer can modify work functions of cathode materials to enhance the collection of electrons. For conventional and inverted polymer solar cells,the cathode modifications can obviously elevate open-circuit voltage,short-circuit current,and fill factor,from which the energy conversion efficiency of polymer solar cells can be improved.