An Alkoxy‐Solubilizing Decacyclic Electron Acceptor for Efficient Ecofriendly As‐Cast Blade‐Coated Organic Solar Cells. Issue 6 (20th March 2020)

• Record Type: Journal Article
• Authors: Han, Xiaona; Zhu, Jingshuai; Xiao, Yiqun; Jiang, Haotian; Zhang, Zhenzhen; Wang, Jiayu; Li, Zhen; Lin, Yuze; Lu, Xinhui; Zhan, Xiaowei
• Is Part Of: Solar RRL. Volume 4:Issue 6(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-03-20
• Subjects: blade coating -- ecofriendly organic solar cells -- fused-ring electron acceptors; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.202000108
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : 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. Abstract : A fused‐ring electron acceptor (F10IC2) with solubilizing alkoxy side chains is designed and synthesized, and as‐cast blade‐coated organic solar cells based on PTB7‐Th: F10IC2 blended films are fabricated from chlorobenzene or chlorine‐free o ‐xylene as solvents in air without any post‐treatment deliver a PCE of 12.5% and 11.4%, respectively.