Indolo-naphthyridine-6,13-dione Thiophene Building Block for Conjugated Polymer Electronics: Molecular Origin of Ultrahigh n-Type Mobility
AuthorsFallon, Kealan J.
Manley, Eric F.
Dimitrov, Stoichko D.
Yousaf, Syeda A.
Ashraf, Raja S.
Guilbert, Anne A. Y.
Freeman, David M. E.
Durrant, James R.
Chen, Lin X.
Marks, Tobin J.
Clarke, Tracey M.
Anthopoulos, Thomas D.
KAUST DepartmentKAUST Solar Center (KSC)
Permanent link to this recordhttp://hdl.handle.net/10754/626627
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AbstractHerein, we present the synthesis and characterization of four conjugated polymers containing a novel chromophore for organic electronics based on an indigoid structure. These polymers exhibit extremely small band gaps of ∼1.2 eV, impressive crystallinity, and extremely high n-type mobility exceeding 3 cm V s. The n-type charge carrier mobility can be correlated with the remarkably high crystallinity along the polymer backbone having a correlation length in excess of 20 nm. Theoretical analysis reveals that the novel polymers have highly rigid nonplanar geometries demonstrating that backbone planarity is not a prerequisite for either narrow band gap materials or ultrahigh mobilities. Furthermore, the variation in backbone crystallinity is dependent on the choice of comonomer. OPV device efficiencies up to 4.1% and charge photogeneration up to 1000 nm are demonstrated, highlighting the potential of this novel chromophore class in high-performance organic electronics.
CitationFallon KJ, Wijeyasinghe N, Manley EF, Dimitrov SD, Yousaf SA, et al. (2016) Indolo-naphthyridine-6,13-dione Thiophene Building Block for Conjugated Polymer Electronics: Molecular Origin of Ultrahigh n-Type Mobility. Chemistry of Materials 28: 8366–8378. Available: http://dx.doi.org/10.1021/acs.chemmater.6b03671.
SponsorsThis material is based upon work supported as part of the Qatar NPRP 7-286-1-046 research grant, UCL Grand Challenge of Sustainable Cities Small Grants and EU Starting Grant “CONTREX”. Use of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357 and Award Number DE-SC0001059; by the U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences under Award Number DE-FG02-08ER46536.
PublisherAmerican Chemical Society (ACS)
JournalChemistry of Materials