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A Highly Efficient Non‐Fullerene Organic Solar Cell with a Fill Factor over 0.80 Enabled by a Fine‐Tuned Hole‐Transporting Layer
Author(s) -
Zheng Zhong,
Hu Qin,
Zhang Shaoqing,
Zhang Dongyang,
Wang Jianqiu,
Xie Shenkun,
Wang Rong,
Qin Yunpeng,
Li Wanning,
Hong Ling,
Liang Ningning,
Liu Feng,
Zhang Yuan,
Wei Zhixiang,
Tang Zhiyong,
Russell Thomas P.,
Hou Jianhui,
Zhou Huiqiong
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201801801
Subject(s) - pedot:pss , materials science , organic solar cell , polystyrene sulfonate , energy conversion efficiency , active layer , photovoltaic system , nanotechnology , polystyrene , layer (electronics) , optoelectronics , chemical engineering , polymer , composite material , electrical engineering , thin film transistor , engineering
With rapid development for tens of years, organic solar cells (OSCs) have attracted much attention for their potential in practical applications. As an important photovoltaic parameter, the fill factor (FF) of OSCs stands for the effectiveness of charge generation and collection, which significantly depends on the properties of the interlayer and active layer. Here, a facile and effective strategy to improve the FF through hole‐transporting layer (HTL) modification is demonstrated. By mixing WO x nanoparticles with a poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) emulsion, the surface free energy of the HTL is improved and the morphology of the active layer is optimized. Benefiting from increased carrier lifetime, a device based on WO x :PEDOT:PSS HTL exhibits a boosted performance with an FF of 80.79% and power conversion efficiency of 14.57% PCE. The results are certified by the National Institute of Metrology (NIM), which, to date, are the highest values in this field with certification. This work offers a simple and viable option of HTL modification to realize highly efficient OSCs.