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Journal of Applied Physics : High-performance C60 n-channel organic field-effect transistors through optimization of interfaces

By Xiao-Hong Zhang and Bernard Kippelen

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Book Id: WPLBN0002169456
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 20 November 2008

Title: Journal of Applied Physics : High-performance C60 n-channel organic field-effect transistors through optimization of interfaces  
Author: Xiao-Hong Zhang and Bernard Kippelen
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Journal of Applied Physics Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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And Bernard Kippelen, X. Z. (n.d.). Journal of Applied Physics : High-performance C60 n-channel organic field-effect transistors through optimization of interfaces. Retrieved from http://gejl.info/


Description
Description: High-performance C60 organic field-effect transistors (OFETs) have been obtained by engineering the essential electrode/semiconductor and dielectric/semiconductor interfaces. By using calcium (Ca) as the source and drain electrodes, the width-normalized contact resistance (RCW) at the electrode/semiconductor interface for devices with channel lengths ranging from 200 down to 25 μm could be reduced to a constant value of 2 kΩ cm at a gate-source voltage (VGS) of 2.6 V, leading to electrical properties that are dominated by gate-modulated resistance of the channel as in conventional metal-oxide-semiconductor field-effect transistors. Channel length scaling of the source-drain current and transconductance is observed. Average charge mobility values of 2.5 cm2/V s extracted at VGS<5 V are found independent of channel length within the studied range. Besides high mobility, overall high electrical performance and stability at low operating voltages are demonstrated by using a 100-nm-thick high-κ gate dielectric layer of aluminum oxide (Al2O3) fabricated by atomic layer deposition and modified with divinyltetramethyldisiloxane-bis (benzocyclobutene). The combined operating properties of these OFETs, obtained in a N2-filled glovebox, are comparable to the best p-channel OFETs and outperform those of amorphous silicon thin-film transistors.

 
 



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