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Non-fullerene acceptor fibrils enable efficient ternary organic solar cells with 16.6% efficiency

DOI: 10.1007/s11426-019-9681-8 DOI Help

Authors: Donghui Li (Wuhan University of Technology) , Xiaolong Chen (Wuhan University of Technology) , Jinglong Cai (Wuhan University of Technology) , Wei Li (Wuhan University of Technology) , Mengxue Chen (Wuhan University of Technology) , Yuchao Mao (Wuhan University of Technology) , Baocai Du (Wuhan University of Technology) , Joel A. Smith (University of Sheffield) , Rachel C. Kilbride (University of Sheffield) , Mary E. O'Kane (University of Sheffield) , Xue Zhang (Wuhan University of Technology) , Yuan Zhuang (Wuhan University of Technology) , Pang Wang (Wuhan University of Technology) , Hui Wang (Wuhan University of Technology) , Dan Liu (Wuhan University of Technology) , Richard A. L. Jones (University of Sheffield) , David G. Lidzey (University of Sheffield) , Tao Wang (Wuhan University of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Science China Chemistry , VOL 6

State: Published (Approved)
Published: February 2020
Diamond Proposal Number(s): 22651

Abstract: Optimizing the components and morphology within the photoactive layer of organic solar cells (OSCs) can significantly enhance their power conversion efficiency (PCE). A new A-D-A type non-fullerene acceptor IDMIC-4F is designed and synthesized in this work, and is employed as the third component to prepare high performance ternary solar cells. IDMIC-4F can form fibrils after solution casting, and the presence of this fibrillar structure in the PBDB-T-2F:BTP-4F host confines the growth of donors and acceptors into fine domains, as well as acting as transport channels to enhance electron mobility. Single junction ternary devices incorporating 10 wt% IDMIC-4F exhibit enhanced light absorption and balanced carrier mobility, and achieve a maximum PCE of 16.6% compared to 15.7% for the binary device, which is a remarkable efficiency for OSCs reported in literature. This non-fullerene acceptor fibril network strategy is a promising method to improve the photovoltaic performance of ternary OSCs.

Journal Keywords: ternary solar cells; non-fullerene acceptor fibrils; power conversion efficiency

Diamond Keywords: Photovoltaics; Semiconductors

Subject Areas: Chemistry, Materials, Energy

Instruments: I07-Surface & interface diffraction

Added On: 20/02/2020 15:00

Discipline Tags:

Earth Sciences & Environment Sustainable Energy Systems Energy Climate Change Energy Materials Materials Science

Technical Tags:

Scattering Wide Angle X-ray Scattering (WAXS) Grazing Incidence Wide Angle Scattering (GIWAXS)