Highly Sensitive, Photocontrolled, Organic Thin-Film Transistors Using Soluble Star-shaped Conjugated Molecules
- Authors
- Cho, Mi Yeon; Kim, Su Jin; Han, Yoon Deok; Park, Dong Hyuk; Kim, Kyung Hwan; Choi, Dong Hoon; Joo, Jinsoo
- Issue Date
- 9-10월-2008
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- FIELD-EFFECT TRANSISTORS; SEMICONDUCTOR; RELAXATION; POLYMERS; CELLS
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.18, no.19, pp.2905 - 2912
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 18
- Number
- 19
- Start Page
- 2905
- End Page
- 2912
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/122568
- DOI
- 10.1002/adfm.200800358
- ISSN
- 1616-301X
- Abstract
- The highly photosensitive characteristics of organic thin-film transistors (OTFTs) made using soluble star-shaped oligothiophenes with four-armed pi-conjugation paths, 4(HPBT)-benzene and 4(HP3T)-benzene molecules having a relatively high quantum yield, are reported. 4(HPBT)-benzene-based organic phototransistors (OPTs) exhibited high photosensitivity (similar to 2500-4300 A W(-1)) even with low optical powers (similar to 6.8-30 mu W cm(-2)) at zero gate bias. The measured photosensitivity of the devices was much higher than that of inorganic single-crystal Si-based phototransistors, as well as that of other OPTs reported earlier. With the highly photosensitive characteristics of the 4(HPBT)-benzene-based OPTs, a high ratio of the on and off current switching of similar to 4 x 10(4) With low optical power and low gate bias was observed. The slow relaxation of the photoinduced charges and charge-trapping phenomena at the interface could lead to a reproducible memory operation for 4(HPBT)-benzene-based OPTs.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Chemistry > 1. Journal Articles
- College of Science > Department of Physics > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.