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Organic thin film transistors and polymer light-emitting diodes patterned by polymer inking and stamping

Dawen Li and L Jay Guo1

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To fully realize the advantages of organic flexible electronics, patterning is very important. In this paper we show that a purely additive patterning technique, termed polymer inking and stamping, can be used to pattern conductive polymer PEDOT and fabricate sub-micron channel length organic thin film transistors. In addition, we applied the technique to transfer a stack of metal/conjugated polymer in one step and fabricated working polymer light-emitting devices. Based on the polymer inking and stamping technique, a roll-to-roll printing for high throughput fabrication has been demonstrated. We investigated and explained the mechanism of this process based on the interfacial energy consideration and by using the finite element analysis. This technique can be further extended to transfer more complex stacked layer structures, which may benefit the research on patterning on flexible substrates.


PACS

85.30.Tv Field effect devices

85.60.Jb Light-emitting devices

85.30.De Semiconductor-device characterization, design, and modeling

Subjects

Electronics and devices

Semiconductors

Optics, quantum optics and lasers

Dates

Issue 10 (21 May 2008)

Received 7 February 2008, in final form 4 April 2008

Published 1 May 2008



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