期刊
LANGMUIR
卷 29, 期 30, 页码 9592-9597出版社
AMER CHEMICAL SOC
DOI: 10.1021/la401729k
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资金
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST)
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
Combining droplet manipulation by the application of an electric field with inkjet printing is proposed as a unique technique to control the surface wettability of substrates for solution-processed organic field-effect transistors (FETs). With the use of this technique, uniform thin films of 2,7-dioctyl[1]benzothieno[2,3,-b][1]benzothiopene (C-8-technique, uniform thin films of 2,7-dioctyl[1]benzothieno[2,3,-b][1]benzothiopene (C-8-BTBT) could be fabricated on the channels of FET substrates without self-assembled monolayer treatment. High-speed camera observation revealed that the crystals formed at the solid/liquid interface. The coverage of the crystals on the channels depended on the ac frequency of the external electric field applied during film formation, leading to a wide variation in the carrier transport of the films. The highest hole mobility of 0.03 cm(2) V-1 s(-1) was obtained when the coverage was maximized with an ac frequency of 1 kHz.
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