Premium
Flexible All‐Solution‐Processed Organic Solar Cells with High‐Performance Nonfullerene Active Layers
Author(s) -
Sun Lulu,
Zeng Wenwu,
Xie Cong,
Hu Lin,
Dong Xinyun,
Qin Fei,
Wang Wen,
Liu Tiefeng,
Jiang Xueshi,
Jiang Youyu,
Zhou Yinhua
Publication year - 2020
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.201907840
Subject(s) - pedot:pss , materials science , organic solar cell , active layer , wetting , layer (electronics) , electrode , substrate (aquarium) , energy conversion efficiency , chemical engineering , optoelectronics , polymer solar cell , nanotechnology , composite material , polymer , chemistry , thin film transistor , oceanography , geology , engineering
All‐solution‐processed organic solar cells (from the bottom substrate to the top electrode) are highly desirable for low‐cost and ubiquitous applications. However, it is still challenging to fabricate efficient all‐solution‐processed organic solar cells with a high‐performance nonfullerene (NF) active layer. Issues of charge extraction and wetting are persistent at the interface between the nonfullerene active layer and the printable top electrode (PEDOT:PSS). In this work, efficient all‐solution‐processed NF organic solar cells (from the bottom substrate to the top electrode) are reported via the adoption of a layer of hydrogen molybdenum bronze (H X MoO 3 ) between the active layer and the PEDOT:PSS. The dual functions of H X MoO 3 include: 1) its deep Fermi level of −5.44 eV can effectively extract holes from the active layer; and 2) the wetting issues of the PEDOT:PSS on the hydrophobic surface of the NF active layer can be solved. Importantly, fine control of the H X MoO 3 composition during the synthesis is critical in obtaining processing orthogonality between H X MoO 3 and the PEDOT:PSS. Flexible all‐solution‐processed NF organic solar cells with power conversion efficiencies of 11.9% and 10.3% are obtained for solar cells with an area of 0.04 and 1 cm 2 , respectively.