Vacuum-processed polyethylene as a dielectric for low operating voltage organic field effect transistors

Date

2012-05-01

Author

Kanbur, Yasin
Irimia-Vladu, Mihai
Glowacki, Eric D.
Voss, Gundula
Baumgartner, Melanie
Schwabegger, Guenther
Leonat, Lucia
Ullah, Mujeeb
Sarica, Hizir
ERTEN ELA, ŞULE
Schwoediauer, Reinhard
Sitter, Helmut
Kucukyavuz, Zuhal
Bauer, Siegfried
Sariciftci, Niyazi Serdar

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We report on the fabrication and performance of vacuum-processed organic field effect transistors utilizing evaporated low-density polyethylene (LD-PE) as a dielectric layer. With C-60 as the organic semiconductor, we demonstrate low operating voltage transistors with field effect mobilities in excess of 4 cm(2)/Vs. Devices with pentacene showed a mobility of 0.16 cm(2)/Vs. Devices using tyrian Purple as semiconductor show low-voltage ambipolar operation with equal electron and hole mobilities of similar to 0.3 cm(2)/Vs. These devices demonstrate low hysteresis and operational stability over at least several months. Grazing-angle infrared spectroscopy of evaporated thin films shows that the structure of the polyethylene is similar to solution-cast films. We report also on the morphological and dielectric properties of these films. Our experiments demonstrate that polyethylene is a stable dielectric supporting both hole and electron channels.

Subject Keywords

Dielectric polymer, Vacuum processed polymer, Evaporable polyethylene, Low-operating voltage field effect transistors

URI

https://hdl.handle.net/11511/68599

Collections

Graduate School of Natural and Applied Sciences, Article