Kumar, Arunandan and Tyagi, Priyanka and Dagar, Janardan and Srivastava, Ritu (2016) Tunable field effect properties in solid state and flexible graphene electronics on composite high - low k dielectric. Carbon, 99. 579-584 . ISSN 0008-6223

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Abstract

We demonstrate tunable field effect properties in solid state and flexible graphene field effect devices (FEDs) fabricated using a poly(methylmethacrylate) (PMMA) and lithium fluoride (LiF) composite dielectric. Increasing the concentration of LiF in the composite dielectric increases the capacitance, which thereby reduces the operating gate voltages of FEDs significantly from 10 V to 1 V to achieve similar conductivity. Electron and hole mobility of 350 and 310 cm(2)/V at V-D = -5 V are obtained for graphene FEDs with 10% LiF concentration in the composite. Composite dielectric also enabled excellent FEDs on flexible substrates without any significant change in mobility and resistance. Flexible FEDs with only 5% and 12% variation in mobility for 300 and 750 bending are obtained.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry > Physical Chemistry Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	23 Apr 2018 12:00
Last Modified:	23 Apr 2018 12:00
URI:	http://npl.csircentral.net/id/eprint/2400

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