Stencil nano lithography based on a nanoscale polymer shadow mask: Towards organic nanoelectronics

Hoyeol Yun, Sangwook Kim, Hakseong Kim, Junghyun Lee, Kirstie McAllister, Junhyung Kim, Sengmoon Pyo, Jun Sung Kim, Eleanor E.B. Campbell, Wi Hyoung Lee, Sang Wook Lee

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A stencil lithography technique has been developed to fabricate organic-material-based electronic devices with sub-micron resolution. Suspended polymethylmethacrylate (PMMA) membranes were used as shadow masks for defining organic channels and top electrodes. Arrays of pentacene field effect transistors (FETs) with various channel lengths from 50 μm down to 500 nm were successfully produced from the same batch using this technique. Electrical transport measurements showed that the electrical contacts of all devices were stable and the normalized contact resistances were much lower than previously studied organic FETs. Scaling effects, originating from the bulk space charge current, were investigated by analyzing the channel-length-dependent mobility and hysteresis behaviors. This novel lithography method provides a reliable means for studying the fundamental transport properties of organic materials at the nanoscale as well as enabling potential applications requiring the fabrication of integrated organic nanoelectronic devices.

Original languageEnglish
Article number10220
JournalScientific Reports
Volume5
DOIs
StatePublished - 11 May 2015

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