Simple push coating of polymer thin-film transistors
| Autor: | Hiromi Minemawari, Hiroyuki Matsui, Yoshinori Horii, Mitsuhiro Ikawa, Masayuki Chikamatsu, Reiji Kumai, Jun'ya Tsutsumi, Toshikazu Yamada, Tatsuo Hasegawa, Reiko Azumi |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Multidisciplinary Materials science business.industry General Physics and Astronomy Nanotechnology General Chemistry Polymer Substrate (printing) engineering.material Article General Biochemistry Genetics and Molecular Biology Flexible electronics Organic semiconductor Crystallinity Semiconductor chemistry Coating engineering Wetting business |
| Zdroj: | Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Organic semiconductors may be processed in solution under ambient conditions; however, liquid manipulation on hydrophobic surfaces is difficult, which may hinder development of devices. Here, a push-coating technique is used to produce large-area semiconducting polymer films over hydrophobic surfaces. Solution processibility is a unique advantage of organic semiconductors, permitting the low-cost production of flexible electronics under ambient conditions. However, the solution affinity to substrate surfaces remains a serious dilemma; liquid manipulation is more difficult on highly hydrophobic surfaces, but the use of such surfaces is indispensable for improving device characteristics. Here we demonstrate a simple technique, which we call ‘push coating’, to produce uniform large-area semiconducting polymer films over a hydrophobic surface with eliminating material loss. We utilize a poly(dimethylsiloxane)-based trilayer stamp whose conformal contact with the substrate enables capillarity-induced wetting of the surface. Films are formed through solvent sorption and retention in the stamp, allowing the stamp to be peeled perfectly from the film. The planar film formation on hydrophobic surfaces also enables subsequent fine film patterning. The technique improves the crystallinity and field-effect mobility of stamped semiconductor films, constituting a major step towards flexible electronics production. |
| Databáze: | OpenAIRE |
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