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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
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)