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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

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.

Original languageEnglish
Title of host publicationOrganic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII
EditorsIain McCulloch, Ruth Shinar, Luisa Torsi, Oana D. Jurchescu, Ioannis Kymissis
PublisherSPIE
ISBN (Electronic)9781628417340
DOIs
StatePublished - 2015
EventOrganic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII - San Diego, United States
Duration: 9 Aug 201512 Aug 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9568
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOrganic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII
Country/TerritoryUnited States
CitySan Diego
Period9/08/1512/08/15

Keywords

  • PDMS
  • Pattern fidelity
  • Selection contact evaporation
  • Solutionprocessed organic field-effect transistor
  • TIPS-pentacene
  • Ultraviolet ozone treatment

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