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Microcrystalline Silicon Thin-Film Transistors for Ambipolar and CMOS Inverters

Published online by Cambridge University Press:  31 January 2011

Kah-Yoong Chan ,
Aad Gordijn ,
Helmut Stiebig  and
Dietmar Knipp
Kah-Yoong Chan
Affiliation:
kahyoongchan@yahoo.comkychan@mmu.edu.my, Multimedia University, Faculty of Engineering, Persiaran Multimedia, Cyberjaya, Selangor, 63100, Malaysia, 603-8312 5438, 603-8318 3029
Aad Gordijn
Affiliation:
a.gordijn@fz-juelich.de, Research Center Juelich, IEF5-Photovoltaics, Juelich, Germany
Helmut Stiebig
Affiliation:
HStiebig@malibu-solar.de, Malibu GmbH & Co. KG, Bielefeld, Germany
Dietmar Knipp
Affiliation:
d.knipp@jacobs-university.de, Jacobs University Bremen, School of Engineering and Science, Bremen, Bremen, Germany
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Abstract

Microcrystalline silicon (μc-Si:H) thin-film transistors (TFTs) have lately gained much attention due to their high charge carrier mobilities. We report on top-gate μc-Si:H TFTs fabricated by plasma-enhanced chemical vapor deposition at process temperatures below 180 °C with high electron and hole charge carrier mobilities exceeding 50 cm2/Vs and 12 cm2/Vs, respectively. Based on the μc-Si:H TFTs different thin-film inverters were realized including ambipolar and complimentary metal-oxide-semiconductor (CMOS) inverters. Microcrystalline CMOS inverters exhibit high voltage gains exceeding 22, whereas ambipolar inverters show reduced voltage gains of 10 at low operating voltages. The electrical characteristics of the μc-Si:H CMOS and ambipolar thin-film inverters will be discussed in terms of the voltage transfer curve, the voltage gain and the power dissipation.

Keywords

plasma-enhanced CVD (PECVD) (deposition)thin filmSi
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1153: Symposium A – Amorphous and Polycrystalline Thin Film Silicon Science and Technology–2009 , 2009 , 1153-A14-02
Copyright
Copyright © Materials Research Society 2009

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