Abstract
A number of semiconducting organic molecules capable of wet processing exhibit high carrier mobility and current modulation. In this work, we synthesized photopatternable π-conjugated star-shaped molecules and characterized their physical properties. The solubility of the synthesized molecules is very good for solution processing. The synthesized organic semiconducting multi-branched molecules are capable of photopatterning by virtue of photopolymerization of the reactive pentadienyl end groups. The transistor devices using these molecules provided a field-effect mobility of 1.3(±0.2) × 10-3-3.7(±0.5) × 10-3 cm2 V-1 s-1 as well as a high current on/off ratio (Ion/off > 103) and a low threshold voltage. In the case of the photoreactive star-shaped conjugated molecule HP2P, it was found that field-effect mobility was maintained even after the photocrosslinking process. This result can be used in the design of photopatternable semiconductor molecules for thin-film transistor electronic applications.
Original language | English |
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Pages (from-to) | 607-617 |
Number of pages | 11 |
Journal | Organic Electronics |
Volume | 10 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2009 Jul |
Bibliographical note
Funding Information:This research work was supported by 21st century Frontier Research Program (2008) and LG-display Co. Ltd. (2008). Particularly, M.J. Cho acknowledges the financial support by the Seoul R&BD Program (2008–2009).
Keywords
- Carrier mobility
- Organic field-effect transistor
- Photoreactive
- Star-shaped molecule
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biomaterials
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry
- Electrical and Electronic Engineering