標題: Directional Solution Coating by the Chinese Brush: A Facile Approach to Improving Molecular Alignment for High-Performance Polymer TFTs
作者: Lin, Fang-Ju
Guo, Cheng
Chuang, Wei-Tsung
Wang, Chien-Lung
Wang, Qianbin
Liu, Huan
Hsu, Chain-Shu
Jiang, Lei
應用化學系
Department of Applied Chemistry
關鍵字: charge-carrier mobility;Chinese brush;controllable liquid transfer;organic thin-film transistors;polymers
公開日期: 13-Sep-2017
摘要: Directional solution coating by the Chinese brush provides a facile approach to fabricate highly oriented polymer thin films by finely controlling the wetting and dewetting processes under directional stress. The biggest advantage of the Chinese brush over the normal western brush is the freshly emergent hairs used, whose unique tapered structure renders a dynamic balance of the liquid within the brush by multiple forces when interacting with the liquid. Consequently, the liquid is steadily held within the brush without any unexpected leakage, making the liquid transfer proceed in a well-controllable manner. It is demonstrated that the Chinese brush coating enables the crystallization of the polymer and the self-assembly of conjugated backbones to proceed in a quasi-steady state via a certain direction, which is attributed to the controllable receding of the three-phase contact line during the dewetting process by the multiple parallel freshly emergent hairs. The as-prepared polymer thin films exhibit over six times higher charge-carrier mobility compared to the spin-coated films, which therefore provides a general approach for high-performance organic thin-film transistors.
URI: http://dx.doi.org/10.1002/adma.201606987
http://hdl.handle.net/11536/146037
ISSN: 0935-9648
DOI: 10.1002/adma.201606987
期刊: ADVANCED MATERIALS
Volume: 29
Appears in Collections:Articles