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Author

Oh, Joon Hak
Organic Electronics Lab
Research Interests
  • Nano Molecular Electronics, Flexible Electronics, Organic Electronic Materials

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Wafer-scale patterning of reduced graphene oxide electrodes by transfer-and-reverse stamping for high performance OFETs

Cited 2 times inthomson ciCited 1 times inthomson ci
Title
Wafer-scale patterning of reduced graphene oxide electrodes by transfer-and-reverse stamping for high performance OFETs
Author
Lee, Joong SukKim, Nam HeeKang, Moon SungYu, HojeongLee, Dong RyoulOh, Joon HakChang, Suk TaiCho, Jeong Ho
Keywords
flexible inverters; micropatterning; reduced graphene oxide; source-drain electrodes; thin films
Issue Date
201308
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, v.9, no.16, pp.2817 - 2825
Abstract
A wafer-scale patterning method for solution-processed graphene electrodes, named the transfer-and-reverse stamping method, is universally applicable for fabricating source/drain electrodes of n- and p-type organic field-effect transistors with excellent performance. The patterning method begins with transferring a highly uniform reduced graphene oxide thin film, which is pre-prepared on a glass substrate, onto hydrophobic silanized (rigid/flexible) substrates. Patterns of the as-prepared reduced graphene oxide films are then formed by modulating the surface energy of the films and selectively delaminating the films using an oxygen-plasma-treated elastomeric stamp with patterns. Reduced graphene oxide patterns with various sizes and shapes can be readily formed onto an entire wafer. Also, they can serve as the source/drain electrodes for benchmark n- and p-type organic field-effect transistors with enhanced performance, compared to those using conventional metal electrodes. These results demonstrate the general utility of this technique. Furthermore, this simple, inexpensive, and scalable electrode-patterning-technique leads to assembling organic complementary circuits onto a flexible substrate successfully. Reproducible and effective wafer-scale patterning of reduced graphene oxide (rGO) electrodes by transfer-and-reverse stamping method is reported. The highly defined rGO micropatterns with various shapes are readily formed on rigid or flexible hydrophobized substrates and serve as the electrodes for high-performance n- and p-type OFETs and complementary inverters.
URI
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DOI
http://dx.doi.org/10.1002/smll.201300538
ISSN
1613-6810
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