Charge-Transport Anisotropy in a Uniaxially Aligned Diketopyrrolopyrrole-Based Copolymer.
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Authors
Gann, Eliot
Thomsen, Lars
Jung, Seok-Heon
Lee, Jin-Kyun
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.
Description
Keywords
alignment, field-effect transistors, organic electronics, shearing
Journal Title
Adv Mater
Conference Name
Journal ISSN
0935-9648
1521-4095
1521-4095
Volume Title
27
Publisher
Wiley
Publisher DOI
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.