Pentacene-based TTFTs with polymer gate dielectric and NiOx electrodes
- Authors
- Hwang, DK; Park, JH; Lee, J; Choi, JM; Kim, JH; Kim, E; Im, S
- Issue Date
- 2005
- Publisher
- ELECTROCHEMICAL SOC INC
- Citation
- ELECTROCHEMICAL AND SOLID STATE LETTERS, v.8, no.6, pp.G140 - G142
- Journal Title
- ELECTROCHEMICAL AND SOLID STATE LETTERS
- Volume
- 8
- Number
- 6
- Start Page
- G140
- End Page
- G142
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/25250
- DOI
- 10.1149/1.1897350
- ISSN
- 1099-0062
- Abstract
- We report on the fabrication of pentacene-based transparent thin-film transistors (TTFTs) that employ pentacene, NiOx, and poly-4-vinylphenol (PVP) for channel, source-drain (S/D) electrode, and gate dielectric, respectively. Spin-coated PVP showed decent dielectric strength (1.5 MV/cm) and constant (k = 3.9). Semitransparent NiOx for S/D electrodes of which the work function is well matched to that of pentacene were deposited on a 50 nm thick pentacene channel by thermal evaporation of NiO powder. NiOx electrodes showed effective transmittance of similar to 40% in the visible range along with good sheet resistance of similar to 60 Omega/rectangle. Our pentacene-based TTFT exhibited a field effect mobility as large as 0.07 cm(2)/V s in the dark, and an on/off current ratio of 10(5). Our work demonstrates that spin-coated PVP and thermal evaporated NiOx are promising gate dielectric and S/D electrode materials for organic TTFTs, respectively. (c) 2005 The Electrochemical Society. All rights reserved.
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