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19 September 2017 Indolo-naphthyridine-6,13-dione thiophene building block for conjugated polymer electronics: Molecular origin of ultrahigh n-type mobility (Conference Presentation)
Kealan Fallon, Nilushi Wijeyasinghe, Eric Manley, Tobin Marks, Thomas Anthopoulos, Hugo A. Bronstein
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Proceedings Volume 10365, Organic Field-Effect Transistors XVI; 103650M (2017) https://doi.org/10.1117/12.2273880
Event: SPIE Organic Photonics + Electronics, 2017, San Diego, California, United States
Abstract
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. We find that electron mobility can be correlated to the degree of order along the conjugated polymer backbone. Finally, we use this novel system to begin to understand the complicated effect of alkyl chain variation on the solid state packing in all 3 dimensions.
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Kealan Fallon, Nilushi Wijeyasinghe, Eric Manley, Tobin Marks, Thomas Anthopoulos, and Hugo A. Bronstein "Indolo-naphthyridine-6,13-dione thiophene building block for conjugated polymer electronics: Molecular origin of ultrahigh n-type mobility (Conference Presentation)", Proc. SPIE 10365, Organic Field-Effect Transistors XVI, 103650M (19 September 2017); https://doi.org/10.1117/12.2273880
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KEYWORDS
Polymers
Crystals
Chromophores
Electronics
Field effect transistors
Molecular electronics
Organic electronics
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