Thermal-Driven Phase Separation of Double-Cable Polymers Enables Efficient Single-Component Organic Solar Cells

摘要

Guitao Feng$1$8Junyu Li$3Yakun He$4Wenyu Zheng$1$8Jing Wang$6Cheng Li$1Zheng Tang$6Andres Osvet$4Ning Li$4$7Christoph J. Brabec$4Yuanping Yi$1He Yan$5Weiwei Li$1$2$9; $1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China$2State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, P. R. China$3DSM DMSC R&D Solutions, P.O. Box 18, 6160 MD Geleen, The Netherlands$4Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science and Engineering, Friedrich-Alexander University Erlangen-Nuernberg, Martensstrasse 7, 91058 Erlangen, Germany$5Department of Chemistry, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China$6Center for Advanced Low-dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China$7National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, 450002 Zhengzhou, P. R. China$8University of Chinese Academy of Sciences, Beijing 10049, P.R. China$9Lead Contact; ;;;;;Iicheng1987@iccas.ac.cn;;;;;;;liweiwei@iccas.ac.cn; Conventional organic solar cells (OSCs) need two components that function as donor and acceptor, respectively. Although there has been wishful thinking about constructing OSCs based on a single component, it is generally believed to be highly challenging to achieve efficient single-component OSCs (SCOSCs). In this work, we design a new double-cable conjugated polymer containing a strongly crystalline backbone as donor and aromatic side units as acceptor. With a high annealing temperature (230 C), both the backbones and perylene bisimide side units could self-organize into ordered nanostructures. This enables efficient charge transport and low charge recombination, resulting in a record efficiency of 6.3% in SCOSCs. The cells also exhibit excellent stability, with >90% efficiency retention over 300 h of continuous one-sun illumination. These results suggest that the concept of SCOSCs is highly promising, especially to overcome the limitations of conventional OSCs toward industrial application.