Low-Voltage-Driven Pentacene Thin-Film Transistors with Cross-Linked Poly(4-vinylphenol)/High-k Bi5Nb3O15 Hybrid Dielectric for Phototransistor
- Authors
- Chang, Seongpil; Chung, Myung-Ho; Kwon, Jae-Hong; Shin, Sang-Il; Oh, Tae-Yeon; Dong, Ki-Young; Lee, Seung-Jun; Cho, Kyung-Hoon; Nahm, Sahn; Ju, Byeong-Kwon
- Issue Date
- 4월-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Organic Thin Film Transistor; Low Voltage; Hybrid Gate Dielectric; Pentacene; Poly(4-vinylphenol); Bi5Nb3O15; Photoresponse
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.4, pp.3355 - 3359
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 4
- Start Page
- 3355
- End Page
- 3359
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108770
- DOI
- 10.1166/jnn.2012.5640
- ISSN
- 1533-4880
- Abstract
- This paper describes the fabrication of pentacene thin-film transistors (TFTs) with an organic/ inorganic hybrid gate dielectric, consisting of cross-linked poly(4-vinylphenol) (PVP) and Bi5Nb3O15. A 300-nm-thick Bi5Nb3O15 dielectric film, grown at room temperature, exhibits a high dielectric constant (high-k) value of 40 but has an undesirable interface with organic semiconductors (OSC). To form better interfaces with OSC, a cross-linked PVP dielectric was stacked on the Bi5Nb3O15 dielectric. It is shown that, with the introduction of a hybrid dielectric, our devices not only can be operated at a low voltage ( 5 V) but also have improved electrical characteristics and photoresponse, including a field-effect mobility of 0.72 cm(2)/V.s, current sub-threshold slopes of 0.29 V/decade, and a photoresponse of 4.84 at a gate bias V-G = 0 V under 100 mW/cm(2) AM 1.5 illumination.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
- College of Engineering > School of Electrical Engineering > 1. Journal Articles
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