TY - JOUR
T1 - Indolo-naphthyridine-6,13-dione thiophene building block for conjugated polymer electronics
T2 - Molecular origin of ultrahigh n-type mobility
AU - Fallon, Kealan J.
AU - Wijeyasinghe, Nilushi
AU - Manley, Eric F.
AU - Dimitrov, Stoichko D.
AU - Yousaf, Syeda A.
AU - Ashraf, Raja S.
AU - Duffy, Warren
AU - Guilbert, Anne A.Y.
AU - Freeman, David M.E.
AU - Al-Hashimi, Mohammed
AU - Nelson, Jenny
AU - Durrant, James R.
AU - Chen, Lin X.
AU - McCulloch, Iain
AU - Marks, Tobin J.
AU - Clarke, Tracey M.
AU - Anthopoulos, Thomas D.
AU - Bronstein, Hugo
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/11/22
Y1 - 2016/11/22
N2 - Herein, 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 cm2 V s-1. 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.
AB - Herein, 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 cm2 V s-1. 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.
UR - http://www.scopus.com/inward/record.url?scp=84997831733&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.6b03671
DO - 10.1021/acs.chemmater.6b03671
M3 - Article
AN - SCOPUS:84997831733
SN - 0897-4756
VL - 28
SP - 8366
EP - 8378
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 22
ER -