Solvent effect of inkjet printed source/drain electrodes on electrical properties of polymer thin-film transistors

Jung Ah Lim, Jeong Ho Cho, Yeong Don Park, Do Hwan Kim, Minkyu Hwang, Kilwon Cho

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86 Citations (Scopus)

Abstract

We show that the electrical properties of polymer thin-film transistors (PTFTs) can be enhanced by controlling the solvent properties of poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT/PSS) solution used as the inkjet-printed source and drain electrodes. Specifically, addition of dimethyl sulfoxide (DMSO) into the PEDOT/PSS solution increased the conductivity of the inkjet-printed PEDOT electrodes and remarkably reduced the contact resistance of the electrodes. The lower contact resistance of the DMSO-treated PEDOT electrode compared to the corresponding electrode without DMSO treatment may be due to enhanced interfacial stability at the contact between the printed PEDOT electrodes and the semiconductor layers.

Original languageEnglish
Article number082102
JournalApplied Physics Letters
Volume88
Issue number8
DOIs
Publication statusPublished - 2006

Bibliographical note

Funding Information:
This work was supported by the National Research Laboratory Program of the Ministry of Science and Technology of Korea, a grant (F0004022) from the Information Display R&D Center under the 21st Century Frontier R&D Program, and the ERC Program of MOST /KOSEF (R11-2003-006-03005-0), the Regional Technology Innovation Program (RTI04-01-04) of MOCIE, and the BK21 Program of the Ministry of Education and Human Resources Development of Korea.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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