Charge‐Transport Anisotropy in a Uniaxially Aligned Diketopyrrolopyrrole‐Based Copolymer. (19th October 2015)

• Record Type: Journal Article
• Authors: Schott, Sam; Gann, Eliot; Thomsen, Lars; Jung, Seok‐Heon; Lee, Jin‐Kyun; McNeill, Christopher R.; Sirringhaus, Henning
• Is Part Of: Advanced materials. Volume 27:Number 45(2015)
• Page Start: 7356
• Page End: 7364
• Publication Date: 2015-10-19
• Subjects: alignment -- field‐effect transistors -- organic electronics -- shearing; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201502437
• Languages: English
• ISSNs: 0935-9648

Abstract

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.