Charge-Transport Anisotropy in a Uniaxially Aligned Diketopyrrolopyrrole-Based Copolymer.
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Abstract
Aligned films of a semiconducting DPP-based copolymer exhibit highly anisotropic charge transport with a band-like temperature dependence along the alignment direction and hole mobilities of up to 6.7 cm(2) V(-1) s(-1) . X-ray diffraction measurements reveal an exceptional degree of in-plane alignment, high crystallinity, and a dominant face-on orientation of the polymer backbones. The surprising charge-transport properties are interpreted in a tie-chain model consistent with anisotropic activation energies.
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Journal Title
Adv Mater
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Journal ISSN
0935-9648
1521-4095
1521-4095
Volume Title
27
Publisher
Wiley
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Except where otherwised noted, this item's license is described as Attribution 2.0 UK: England & Wales
Sponsorship
Engineering and Physical Sciences Research Council (EP/G060738/1)
The authors gratefully acknowledge funding from the Engineering and Physical Sciences Research Council (EPSRC) through a program grant (EP/G060738/1). C.R.M. acknowledges support from the Australia Research Council (FT100100275 and DP130102616). This work was performed in part at the SAXS/WAXS[59] and soft X-ray[60] beam lines at the Australian Synchrotron. C.R.M. and E.G. thank Nigel Kirby of the Australian Synchrotron for technical assistance.