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Proceedings Paper

Importance of surface modification of a micro-contact stamp for pattern fidelity of soluble organic semiconductors
Author(s): Hea-Lim Park; Bo-Yeon Lee; Se-Um Kim; Jeng-Hun Suh; Min-Hoi Kim; Sin-Doo Lee
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Paper Abstract

We described the effect of the ultraviolet ozone (UVO) treatment of a polydimethylsiloxane (PDMS) stamp on the fidelity of 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) patterns produced from a TIPS-PEN/polymer blend by selective contact evaporation (SCE). During the SCE process, the TIPS-PEN in contact with the nanoporous PDMS was absorbed into the PDMS stamp, leaving out the TIPS-PEN patterns, complementary to the PDMS patterns, in the non-contact regions. For the case of the untreated, hydrophobic PDMS surface, the TIPS-PEN patterns developed initially were shrunken and eventually disappeared after 24 h due to the steady absorption of the TIPS-PEN in time. In contrast, for the UVO-treated case, the TIPS-PEN patterns were found to maintain the initial shapes over the period of 24 h since the absorption of the TIPS-PEN was limited by the hydrophilic nature of the UVO-treated PDMS. The modified PDMS surface by the UVO for 30 min yielded the highest fidelity of the TIPS-PEN patterns in both height and width. The patterned TIPS-PEN layer by the SCE was implemented into an organic field-effect transistor to demonstrate the viability of the SCE combined with the UVO treatment for solution-processed organic electronic devices.

Paper Details

Date Published: 31 August 2015
PDF: 6 pages
Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 956815 (31 August 2015); doi: 10.1117/12.2187774
Show Author Affiliations
Hea-Lim Park, Seoul National Univ. (Korea, Republic of)
Bo-Yeon Lee, Seoul National Univ. (Korea, Republic of)
Se-Um Kim, Seoul National Univ. (Korea, Republic of)
Jeng-Hun Suh, Seoul National Univ. (Korea, Republic of)
Min-Hoi Kim, Hanbat National Univ. (Korea, Republic of)
Sin-Doo Lee, Seoul National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 9568:
Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII
Ioannis Kymissis; Iain McCulloch; Ruth Shinar; Oana D. Jurchescu; Luisa Torsi, Editor(s)

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