A Highly Efficient Non‐Fullerene Organic Solar Cell with a Fill Factor over 0.80 Enabled by a Fine‐Tuned Hole‐Transporting Layer
Abstract
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 WOx 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 WOx: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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 10, 2018
- Source ID
- 10.1002/adma.201801801
Entities
People
- Dongyan Zhang
- Feng Liu
- Huiqiong Zhou
- Jianhui Hou
- Jianqiu Wang
- Ling Hong
- Ningning Liang
- Q. Hu
- Rong Wang
- Shaoqing Zhang
- Shenkun Xie
- Thomas Paul Russell
- Wanning Li
- Yuan Zhang
- Yunpeng Qin
- Zhixiang Wei
- Zhiyong Tang
- Zhong Zheng
Organizations
- Beihang University
- Beijing National Laboratory for Molecular Sciences
- Chinese Academy of Sciences
- Lawrence Berkeley National Laboratory
- National Natural Science Foundation of China
- Office of Naval Research Global