Document Type

Journal Article

Department/Unit

Department of Physics

Abstract

Organic field-effect transistors (OFETs) represent a low-cost transistor technology for creating next-generation large-area, flexible and ultra-low-cost electronics. Conjugated electron donor-acceptor (D-A) polymers have surfaced as ideal channel semiconductor candidates for OFETs. However, high-molecular weight (MW) D-A polymer semiconductors, which offer high field-effect mobility, generally suffer from processing complications due to limited solubility. Conversely, the readily soluble, low-MW D-A polymers give low mobility. We report herein a facile solution process which transformed a lower-MW, low-mobility diketopyrrolopyrrole-dithienylthieno[3,2-b]thiophene (I) into a high crystalline order and high-mobility semiconductor for OFETs applications. The process involved solution fabrication of a channel semiconductor film from a lower-MW (I) and polystyrene blends. With the help of cooperative shifting motion of polystyrene chain segments, (I) readily self-assembled and crystallized out in the polystyrene matrix as an interpenetrating, nanowire semiconductor network, providing significantly enhanced mobility (over 8 cm2V−1s−1), on/off ratio (107), and other desirable field-effect properties that meet impactful OFET application requirements.

Publication Year

2016

Journal Title

Scientific Reports

Volume number

6

Publisher

Nature Publishing Group

First Page (page number)

24476

Referreed

1

DOI

10.1038/srep24476

ISSN (print)

20452322

Link to Publisher’s Edition

http://dx.doi.org/10.1038/srep24476

ISSN (electronic)

20452322

Additional Files

JA-5052-28977_publisher_suppl.pdf (655 kB)

Share

COinS