Document Type
Journal Article
Department/Unit
Department of Physics
Language
English
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 Date
4-30-2016
Source Publication Title
Scientific Reports
Volume
6
Start Page
24476
Publisher
Nature Publishing Group
Peer Reviewed
1
DOI
10.1038/srep24476
Link to Publisher's Edition
http://dx.doi.org/10.1038/srep24476
ISSN (print)
20452322
ISSN (electronic)
20452322
APA Citation
Lei, Y., Deng, P., Li, J., Lin, M., Zhu, F., Ng, T., Lee, C., & Ong, B. (2016). Solution-processed donor-acceptor polymer nanowire network semiconductors for high-performance field-effect transistors. Scientific Reports, 6, 24476. https://doi.org/10.1038/srep24476