title: Solution-processed highly conductive PEDOT:PSS/AgNW/GO transparent film for efficient organic-Si hybrid solar cells.
abstract: Hybrid solar cells based on n-Si/poly(3,4-ethylenedioxythiophene):poly(styrene- sulfonate) (PEDOT:PSS) heterojunction promise to be a low cost photovoltaic technology by using simple device structure and easy fabrication process. However, due to the low conductivity of PEDOT:PSS, a metal grid deposited by vacuum evaporation method is still required to enhance the charge collection efficiency, which complicates the device fabrication process. Here, a solution-processed graphene oxide (GO)-welded silver nanowires (AgNWs) transparent conductive electrode (TCE) was employed to replace the vacuum deposited metal grid. A unique "sandwich" structure was developed by embedding an AgNW network between PEDOT:PSS and GO with a figure-of-merit of 8.6×10(-3) Ω(-1), which was even higher than that of sputtered indium tin oxide electrode (6.6×10(-3) Ω(-1)). A champion power conversion efficiency of 13.3% was achieved, because of the decreased series resistance of the TCEs as well as the enhanced built-in potential (Vbi) in the hybrid solar cells. The TCEs were obtained by facile low-temperature solution process method, which was compatible with cost-effective mass production technology.
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou 215123, P.R. China.
authors.forename: Qiaojing
authors.initials: Q
authors.lastname: Xu
authors.forename: Tao
authors.initials: T
authors.lastname: Song
authors.forename: Wei
authors.initials: W
authors.lastname: Cui
authors.forename: Yuqiang
authors.initials: Y
authors.lastname: Liu
authors.forename: Weidong
authors.initials: W
authors.lastname: Xu
authors.forename: Shuit-Tong
authors.initials: ST
authors.lastname: Lee
authors.forename: Baoquan
authors.initials: B
authors.lastname: Sun
keywords: graphene oxide; hybrid silicon solar cell; silver nanowires; solution-processed; transparent conductive electrode