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An Alkoxy‐Solubilizing Decacyclic Electron Acceptor for Efficient Ecofriendly As‐Cast Blade‐Coated Organic Solar Cells
Author(s) -
Han Xiaona,
Zhu Jingshuai,
Xiao Yiqun,
Jiang Haotian,
Zhang Zhenzhen,
Wang Jiayu,
Li Zhen,
Lin Yuze,
Lu Xinhui,
Zhan Xiaowei
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202000108
Subject(s) - organic solar cell , alkoxy group , chlorobenzene , materials science , acceptor , energy conversion efficiency , electron acceptor , coating , chemical engineering , nanotechnology , polymer , organic chemistry , chemistry , optoelectronics , composite material , catalysis , alkyl , physics , engineering , condensed matter physics
The rapid development of organic solar cells (OSCs) based on nonfullerene acceptors has achieved significant breakthroughs in the power conversion efficiency (PCE) of spin‐coated devices. However, the spin‐coating method in a protective atmosphere seems unsuitable for the practical printing of high‐performance solar panels. In addition, the use of highly toxic solvents is also a stumbling block to the commercial application of OSCs. Thus, photoactive materials for scalable coating and ecofriendly manufacturing approaches are necessary to be developed for OSCs. Herein, a fused‐ring electron acceptor named F10IC2 bearing a decacycle core and solubilizing alkoxyl side chains is synthesized and applied in as‐cast blade‐coated OSCs by blending with polymer donor PTB7‐Th. As‐cast OSCs based on PTB7‐Th: F10IC2 blended films fabricated from chlorobenzene or chlorine‐free o ‐xylene solvents in air without any posttreatment deliver a PCE of 12.5% and 11.4%, respectively, which are among the highest values reported for as‐cast blade‐coated OSCs. Herein, a strategy of alkoxyl solubilizing to design high‐performance material systems for ecofriendly scalable OSCs is provided, which is suitable for future industrial production.