Work function tuning of metal/graphene stack electrode

Song, Seung Min; Bong, Jae Hoon; Cho, Byung Jin

doi:10.1063/1.4866337

Cited by 18 publications

(15 citation statements)

References 11 publications

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“…Internal photoemission (IPE) spectroscopy [45], low-energy electron microscopy (LEEM) [44,46], scanning tunneling microscopy (STM) [47], scanning photocurrent microscopy (SPCM) [9], and capacitance-voltage (C-V) measurements using a metalgraphene semiconductor capacitor structure [48,49] are other methods used worldwide for measuring the WF of graphene.…”

Section: Other Methodsmentioning

confidence: 99%

“…The interesting finding here is that the effect of metal contact on the WF of graphene varied for graphene layers with different thicknesses. Song et al reported that tuning the WF of graphene in contact with metal from 4.3 eV to 5.1 eV could be achieved by changing its thickness [48]. They showed that the WF of SLG was easily affected by the WF of the metal contact, while that of FLG was less sensitive ( Figure 3c).…”

Section: Doping Graphene Layers With Different Thickness Was Investigmentioning

confidence: 99%

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Tuning the work function of graphene toward application as anode and cathode

Naghdi

Sánchez‐Arriaga

Rhee

2019

Journal of Alloys and Compounds

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The rapid technological progress in the 21 st century demands new multi-functional materials applicable to a wide variety of industries. Two-dimensional (2D) materials are predicted to have a revolutionary impact on the cost, size, weight, and functions of future electronic and optoelectronic devices. Graphene, which shows potential as an alternative to conventional conductive transparent metal oxides, may play a central role. Since its work function (WF) is tunable, graphene exhibits the interesting ability to serve two different roles in electronic and optoelectronic devices, both as an anode and a cathode.After introducing some basic concepts, this work reviews the most important advances in controlling the tuned WF of graphene, highlighting special features of graphene electronic band structure and recognizing different methods for measuring WF. The impact of thickness, type of contact, chemical doping, UV and plasma treatments, defects, and functional groups of graphene oxide are considered and related with the applications of the modulated material. The results of the review, organized in lookup tables, have been used to identify the advantages and main challenges of the tuning methods.

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Section: Other Methodsmentioning

confidence: 99%

Section: Doping Graphene Layers With Different Thickness Was Investigmentioning

confidence: 99%

Tuning the work function of graphene toward application as anode and cathode

Naghdi

Sánchez‐Arriaga

Rhee

2019

Journal of Alloys and Compounds

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“…Calculations are carried out using the preferred functional in the case of adsorption energy, LDA, for the A configuration. The WF of monolayer graphene is calculated to be 4.52 eV, which is under the measured value of ~ 5 eV by Song et al As they also reported, it is considerably affected by metal contacts [45]. The results clearly show that WF of NMCs is larger than that of graphene.…”

Section: Physisorption Interfacementioning

confidence: 69%

Noble metal chain adsorption on graphene sheet

2016

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“…32 Despite charge transfer and the development of a built-in potential, its magnitude (and that of the work-function change) can be expected to be small for the scenario of a one to two monolayers of graphene deposition. Studies, for example by Song et al, 33 point to relatively small work-function changes. Thus it remains unclear why the modest shifts might cause large changes in SEY values from over 1.0 for pure copper, as reported.…”

confidence: 99%

Calculations of secondary electron yield of graphene coated copper for vacuum electronic applications

et al. 2018

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The suppression of secondary electron yield (SEY) which can possibly lead to multipactor is an important goal for several applications. Though some techniques have focused on geometric modifications to lower the SEY, the use of graphene coatings as thin as a few monolayers is a promising new development that deserves attention either as a standalone technique or in concert with geometric alterations. Here we report on Monte Carlo based numerical studies of SEY on graphene coated copper with comparisons to recent experimental data. Our predicted values are generally in good agreement with reported measurements. Suppression of the secondary electron yield by as much as 50 percent (over copper) with graphene coating is predicted at energies below 125 eV, and bodes well for multipactor suppression in radio frequency applications.

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Work function tuning of metal/graphene stack electrode

Abstract: Articles you may be interested inErratum: "Work function tuning and improved gate dielectric reliability with multilayer graphene as a gate electrode for metal oxide semiconductor field effect device applications" [Appl.

Cited by 18 publications

References 11 publications

Tuning the work function of graphene toward application as anode and cathode

Tuning the work function of graphene toward application as anode and cathode

Noble metal chain adsorption on graphene sheet

Calculations of secondary electron yield of graphene coated copper for vacuum electronic applications

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