NDLI: Low-power organic electronics based on gate-tunable injection barrier in vertical graphene-organic semiconductor heterostructures

Content Provider	IEEE Xplore Digital Library
Author	Hlaing, H. Carta, F. Barton, R. Chang-Yong Nam Petrone, N. Hone, J. Kymissis, I.
Copyright Year	2014
Description	Author affiliation: Dept. of Mech. Eng., Columbia Univ., New York, NY, USA (Petrone, N.) \|\| Brookhaven Nat. Lab., Center for Functional Nanomater., Upton, NY, USA (Chang-Yong Nam) \|\| Dept. of Electr. Eng., Columbia Univ., New York, NY, USA (Carta, F.) \|\| Energy Frontier Res. Center, Columbia Univ., New York, NY, USA (Hlaing, H.; Barton, R.; Hone, J.; Kymissis, I.)
Abstract	Novel device architectures based on heterostructures of graphene with semiconductor layers have recently attracted considerable interest due to their potential in a wide range of electronic and photonic applications. The key concept in these devices is to exploit the work function tunability of graphene via external gate field to modulate the current flow across the graphene-semiconductor junction by adjusting the Schottky barrier height. Transistor devices based on a vertical heterojunction of graphene with inorganic semiconductors (n- and p-type Silicon) [1], oxide semiconductor (n-type indium gallium zinc oxide) [2,3] and flakes of 2D layered materials (molybdenum disulfide, tungsten disulfide) [4-7] have been successfully fabricated with a high on/off ratio, overcoming the limitation of planar graphene field-effect devices. We demonstrate, for the first time, low-voltage complementary p- and n-channel vertical organic thin film transistors (VOTFTs) based on the graphene-organic semiconductor heterojunctions with simple, scalable and low-temperature fabrication process. VOTFT device with thin layer of prototypical n-type organic semiconductor $C_{60}$ exhibits high on-current densities in the range of 10 $mA/cm^{2}$ with the driving voltage of only 1 V suppressing the output current of traditional planar organic field-effect transistors. It can also operate at the bias as low as 200 mV with high on/off ratio $(~10^{3}).$ For low-power logic application, complementary VOTFT devices with prototypical p-type organic semiconductors (CuPc, Pentacene, α-6T, Rubrene) are also investigated.
Starting Page	279
Ending Page	280
File Size	372664
Page Count	2
File Format	PDF
ISBN	9781479954056
e-ISBN	9781479954063
DOI	10.1109/DRC.2014.6872405
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Graphene Logic gates Electrodes Voltage measurement Temperature measurement Organic semiconductors Semiconductor device measurement
Content Type	Text
Resource Type	Article

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