Bias Stress Effects on Different Dielectric Surfaces of Pentacene Thin-Film Transistors
- Authors
- Hyung, Gun Woo; Koo, Ja-Ryong; Seo, Ji Hoon; Yang, Jin Woo; Lee, Ho Won; Pyo, Sang Woo; Kim, Young Kwan
- Issue Date
- May-2011
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Pentacene Thin Film Transistors; Hysteresis; Threshold Voltage Shift; Adhesion Layer
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, no.5, pp.4338 - 4342
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 11
- Number
- 5
- Start Page
- 4338
- End Page
- 4342
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19899
- DOI
- 10.1166/jnn.2011.3651
- ISSN
- 1533-4880
- Abstract
- In this paper, it was demonstrated that pentacene thin-film transistors (TFTs) were fabricated with an organic adhesion layer between an organic semiconductor and a gate insulator. In order to form polymeric film as an adhesion layer, a vapor deposition polymerization (VDP) process was introduced to substitute for the usual spin-coating process. Field effect mobility, threshold voltage, and on/off current ratio in pentacene TFTs with a 15 nm thick organic adhesion layer were about 0.4 cm(2)/Vs, -1 V, and 10(6), respectively. We also demonstrated that threshold voltage strongly depends on the stress time when a gate voltage has been applied for bias stress test. We suggest that a polyimide adhesion layer fabricated by the VDP method can be applied to realize organic TFTs with long-term stability because of lower threshold voltage shifts due to reduced charge trapping at the interface between the pentacene semiconductor and the polyimide layer.
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