Research Progress of Si/PEDOT∶PSS Heterojunction Solar Cells
FANG Wenzhong1,2,†, SUN Tao2,3,†, DUAN Yong1,2, WANG Pan1,2, NI Zitao2,3, YANG Yu2,3
1 College of Materials Science and Engineering, Yunnan University, Kunming 650091 2 National Joint Research Center for Photovoltaic Energy Materials, Yunnan University, Kunming 650091 3 Institute of Energy Research, Yunnan University, Kunming 650091
Abstract: Si/organic hybrid solar cells, using organic materials as photohole transporting layers, have been achieved significant developments of in recent years caused by the optimization of material modification and device retrofit. However, the organic composites’ shortages, like low electrical conductivity and interface instability, seriously affected power conversion efficiency (PCE) and device lifetime, and hindered the deve-lopment of photovoltaic technologies and applications. As the best organic materials for Si/organic heterojunction solar cells, PEDOT∶PSS, owing to its excellent conductivity and transmittance, became an ideal organic material and used for photohole-transporting layers. Comparing to traditional silicon-based solar cells, the combined PEDOT∶PSS layer has high conductivity for effectively transferring generated holes, and the high permeability reduces the parasitic absorption. In addition, the assembly process is not require high temperature, remarkably reducing the production costs. But the PSS components is insulative and deteriorates the conductivity and stability of PEDOT∶PSS film, thereby, numerous research work focused on the material modification and device conversation via material synthesis, micro-interface design, structural reorganization and other techniques. Their significant job greatly promoted the preparative techniques and applications of Si/PEDOT∶PSS solar cells, and dramatically increased the PCE from 5.09% to 17.4%. Thus, this article studies the structures and working principles of Si/PEDOT∶PSS heterojunction solar cells firstly, particularly investigates the methods and mechanisms of micro surface design, interface oxide-layer introduction, doping modification, microgrid electrode intercalation and other optimal approaches. We also supplies our prospects for the technical development and theoretical analysis, which might provide some suggestions for the technological development and industrial manufactory of Si/PEDOT∶PSS heterogeneous junction solar cells.
方文中, 孙韬, 端勇, 王盼, 倪子涛, 杨宇. Si/PEDOT∶PSS异质结太阳能电池研究进展[J]. 材料导报, 2019, 33(23): 3908-3914.
FANG Wenzhong, SUN Tao, DUAN Yong, WANG Pan, NI Zitao, YANG Yu. Research Progress of Si/PEDOT∶PSS Heterojunction Solar Cells. Materials Reports, 2019, 33(23): 3908-3914.
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