Importance of surface modification of a micro-contact stamp for pattern fidelity of soluble organic semiconductors

Hea-Lim Park; Bo-Yeon Lee; Se-Um Kim; Jeng-Hun Suh; Min-Hoi Kim; Sin-Doo Lee

doi:10.1117/12.2187774

31 August 2015 Importance of surface modification of a micro-contact stamp for pattern fidelity of soluble organic semiconductors

Hea-Lim Park, Bo-Yeon Lee, Se-Um Kim, Jeng-Hun Suh, Min-Hoi Kim, Sin-Doo Lee

Author Affiliations +

Proceedings Volume 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII; 956815 (2015) https://doi.org/10.1117/12.2187774
Event: SPIE Organic Photonics + Electronics, 2015, San Diego, California, United States

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.

Citation Download Citation

Hea-Lim Park, Bo-Yeon Lee, Se-Um Kim, Jeng-Hun Suh, Min-Hoi Kim, and Sin-Doo Lee "Importance of surface modification of a micro-contact stamp for pattern fidelity of soluble organic semiconductors", Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 956815 (31 August 2015); https://doi.org/10.1117/12.2187774

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