Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
Keywords:
-
CLC:
PACS:
-
DOI:
10.7502/j.issn.1674-3962.2015.02.06
DocumentCode:
Abstract:
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, the three cell parameters, from which the energy conversion efficiency of polymer solar cells can be improved.