Pentacene organic field-effect transistor on metal substrate with spin-coated smoothing layer

Yanbo Jin, Zhenlin Rang, Marshall I. Nathan, P. Paul Ruden, Christopher R. Newman, C. Daniel Frisbie

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37 Scopus citations


In this letter we report the use of roughly polished aluminum substrates with spin-coated polymer-smoothing layers for the fabrication of pentacene field-effect transistors. Transistors with spin-coated poly(methylrnethacrylate) gate insulator layers were fabricated and showed good performance. On the gate insulator surface, the root-mean-square roughness was found to be 0.18 nm. significantly smaller than the aluminum surface roughness, which is on the scale of tens of nanometers. Field-effect carrier mobilities extracted from the device data reached 0.75 cm 2 V -1 s -1 ; the maximum on/off current ratio was near 05 × 10 6.

Original languageEnglish (US)
Pages (from-to)4406-4408
Number of pages3
JournalApplied Physics Letters
Issue number19
StatePublished - Nov 8 2004

Bibliographical note

Funding Information:
This work was partially supported by the NSF materials research science and engineering center program MRSEC (DMR No. 0212302). The authors gratefully acknowledge Paul V. Pesavento, Kanan P. Puntambekar, Lei Diao, Jeffrey A. Merlo, and Xiuyu Cai for experimental support.


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