Influence of Au doping on electrical properties of CVD graphene

Krajewska, Aleksandra; Oberda, Krzysztof; Azpeitia, Jon; Gutiérrez, Alejandro; Pasternak, Iwona; López, María Francisca; Mierczyk, Zygmunt; Munuera, Carmen; Strupiński, Włodek

doi:10.1016/j.carbon.2016.01.066

Cited by 30 publications

(17 citation statements)

References 40 publications

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“…As revealed by XPS, the noble-metal-chloride doping process is a charge transfer process, where Au 3+ is reduced to Au 0 through electron depleting in graphene [ 95 , 96 ]. Au 0 atoms tend to form nanoparticles during this process, and the nanoparticle size increases as the dopant concentration increases [ 95 ]. However, these nanoparticles also serve as scattering centers for electromagnetic waves, which could lead to a reduction of the transmission.…”

Section: Contact Engineering Between Graphene and Ganmentioning

confidence: 99%

Graphene as a Transparent Conductive Electrode in GaN-Based LEDs

et al. 2022

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Graphene combines high conductivity (sheet resistance down to a few hundred Ω/sq and even less) with high transparency (>90%) and thus exhibits a huge application potential as a transparent conductive electrode in gallium nitride (GaN)-based light-emitting diodes (LEDs), being an economical alternative to common indium-based solutions. Here, we present an overview of the state-of-the-art graphene-based transparent conductive electrodes in GaN-based LEDs. The focus is placed on the manufacturing progress and the resulting properties of the fabricated devices. Transferred as well as directly grown graphene layers are considered. We discuss the impact of graphene-based transparent conductive electrodes on current spreading and contact resistance, and reveal future challenges and perspectives on the use of graphene in GaN-based LEDs.

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Section: Contact Engineering Between Graphene and Ganmentioning

confidence: 99%

Graphene as a Transparent Conductive Electrode in GaN-Based LEDs

et al. 2022

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“…Successful delamination of graphene brings the application potential of low-dimension materials as photocatalysts, electrodes, sensors, and photodetectors due to their unique physical and chemical properties compared with those of conventional bulk materials, such as high specific surface activity, novel electronic, adjustable band gap, strong charge transfer, etc. − Until now, series of two-dimensional (2D) materials have been successfully synthesized including graphene oxides, ,, g-C 3 N 4 , − − borophene, , traditional metal dichalcogenides (TMDs), , and MXenes, − among which metal-free-based materials appear as interesting options because of their renewable and environmentally friendly properties. In regard to 2D carbonaceous materials, doping engineering is the dominant approach to improve the catalytic activity, such as Au doping graphene, Cu/Co/Fe doping g-C 3 N 4 , Ag 2 CrO 4 /g-C 3 N 4 /graphene . For the neighboring element to carbon according to the periodic table of elements, boron monolayer or borophene has attracted abundant attention due to its metallic feature with a strong complementary electronic structure similar to that of graphene .…”

Section: Introductionmentioning

confidence: 99%

“…7−19 Until now, series of two-dimensional (2D) materials have been successfully synthesized including graphene oxides, 13,20,21 g-C 3 N 4 , 22−2622−26 borophene, 7,27 traditional metal dichalcogenides (TMDs), 28,29 and MXenes, 28−30 among which metalfree-based materials appear as interesting options because of their renewable and environmentally friendly properties. In regard to 2D carbonaceous materials, doping engineering is the dominant approach to improve the catalytic activity, such as Au doping graphene, 20 Cu/Co/Fe doping g-C 3 N 4 , 3131 Ag 2 CrO 4 /g-C 3 N 4 /graphene. 32 For the neighboring element to carbon according to the periodic table of elements, boron monolayer or borophene has attracted abundant attention due to its metallic feature with a strong complementary electronic structure similar to that of graphene.…”

Section: Introductionmentioning

confidence: 99%

Strain-Engineered Metal-Free h-B₂O Monolayer as a Mechanocatalyst for Photocatalysis and Improved Hydrogen Evolution Reaction

et al. 2020

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Developing stable metal-free materials with a highly efficient hydrogen evolution reaction (HER) has received intense research interest due to its renewable and environmentally friendly properties. In this work, we systematically investigated the HER catalytic activity of a new h-B2O monolayer based on first-principles calculations. The results show the B site in the h-B2O structure is energetically favorable for hydrogen with the calculated Gibbs free energy (ΔG H*) of −0.07 eV, which is comparable to that of the Pt catalyst (ΔG H* = −0.09 eV). Moreover, the catalytic activity of the h-B2O monolayer is quite robust with increasing hydrogen coverages (from 1/9 to 9/9). Interestingly, the HER activity of the h-B2O monolayer is sensitive to the strains-driven. For example, applied tensile strains (0–2%) could weaken the bonding between hydrogen and the substrate, resulting in ΔG H* even close to 0 eV. However, the opposite trend is found for applied compressive strain. After analyzing the density of states (DOS), we found the h-B2O monolayer with absorbed hydrogen retains the metallic property, still exhibiting excellent electrical conductivity. These results reveal that the metal-free h-B2O monolayer is a promising candidate for HER applications.

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“…Therefore, when looking at surface transfer doping, strong electron acceptor molecules will have to be applied to extract electrons from graphene, thereby further lowering its chemical potential. This can be achieved by using different dopant molecules, including inorganic acids 27,28 (H 2 SO 4 , HNO 3 , HCl, HAuCl 3 ), transition metal oxides (MoO 3 29,30 and VO x…”

Section: Introductionmentioning

confidence: 99%