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Photocurable propyl-cinnamate-functionalized polyhedral oligomeric silsesquioxane as a gate dielectric for organic thin film transistors

Cited 15 time in Web of Science Cited 16 time in Scopus
Authors
Kim, Yuntae; Roh, Jeongkyun; Kim, Ji-Hoon; Kang,Chan-mo; Kang, In-Nam; Jung, Byung Jun; Lee, Changhee; Hwang, Do-Hoon
Issue Date
2013-09
Publisher
Elsevier B.V.
Citation
Organic Electronics Vol.14 No.9, pp. 2315-2323
Keywords
공학Polyhedral oligomeric silsesquioxanePhotocurable cinnamateInsulator
Abstract
A polyhedral oligomeric silsesquioxane (POSS)-based insulating material with photocurable propyl-cinnamate groups (POSS-CYNNAM) was designed and synthesized through simple single step reaction for use as a gate dielectric in organic thin-film transistors (OTFT). POSS-CYNNAM was soluble in common organic solvents and formed a smooth thin film after spin-casting. A thin film of POSS-CYNNAM was cross-linked and completely solidified under UV irradiation without the use of additives such as photoacid generators or photoradical initiators. ITO/insulator/Au devices were fabricated and characterized to measure the dielectric properties of POSS-CYNNAM thin films, such as leakage current and capacitance. A pentacene-based OTFT using the synthesized insulator as the gate dielectric layer was fabricated on the transparent indium tin oxide (ITO) electrode, and its performance was compared to OTFTs using thermally cross-linked poly(vinyl phenol) (PVP) as the insulator. The fabricated POSS-CYNNAM OTFT showed a comparable performance to devices based on the PVP insulator with 0.1 cm(2)/Vs of the field effect mobility and 4.2 x 10(5) of an on/off ratio.
ISSN
1566-1199
Language
English
URI
https://hdl.handle.net/10371/90956
DOI
https://doi.org/10.1016/j.orgel.2013.05.030
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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