Anisotropy of Charge Transport in a Uniaxially Aligned Fused Electron-Deficient Polymer Processed by Solution Shear Coating

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 32(2020), 23 vom: 01. Juni, Seite e2000063
1. Verfasser:	Xiao, Mingfei (VerfasserIn)
Weitere Verfasser:	Kang, Boseok, Lee, Seon Baek, Perdigão, Luís M A, Luci, Alex, Warr, Daniel A, Senanayak, Satyaprasad P, Nikolka, Mark, Statz, Martin, Wu, Yutian, Sadhanala, Aditya, Schott, Sam, Carey, Remington, Wang, Qijing, Lee, Mijung, Kim, Chaewon, Onwubiko, Ada, Jellett, Cameron, Liao, Hailiang, Yue, Wan, Cho, Kilwon, Costantini, Giovanni, McCulloch, Iain, Sirringhaus, Henning
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2020
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article conjugated polymers electron transport organic field-effect transistors polymer alignment shear coating

Beschreibung
Zusammenfassung:	© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Precise control of the microstructure in organic semiconductors (OSCs) is essential for developing high-performance organic electronic devices. Here, a comprehensive charge transport characterization of two recently reported rigid-rod conjugated polymers that do not contain single bonds in the main chain is reported. It is demonstrated that the molecular design of the polymer makes it possible to achieve an extended linear backbone structure, which can be directly visualized by high-resolution scanning tunneling microscopy (STM). The rigid structure of the polymers allows the formation of thin films with uniaxially aligned polymer chains by using a simple one-step solution-shear/bar coating technique. These aligned films show a high optical anisotropy with a dichroic ratio of up to a factor of 6. Transport measurements performed using top-gate bottom-contact field-effect transistors exhibit a high saturation electron mobility of 0.2 cm2 V-1 s-1 along the alignment direction, which is more than six times higher than the value reported in the previous work. This work demonstrates that this new class of polymers is able to achieve mobility values comparable to state-of-the-art n-type polymers and identifies an effective processing strategy for this class of rigid-rod polymer system to optimize their charge transport properties
Beschreibung:	Date Revised 30.09.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202000063