Chemical vapour deposition growth of graphene layers on metal substrates

Lai, Yi-Chun; Yu, S. C.; Rafailov, P. M.; Vlaikova, E.; Valkov, Stefan; Petrov, Stefan; Koprinarova, J.; Terziyska, P.; Marinova, Vera; Lin, Shiuan-Huei; Yu, P.; C., G.; Dimitrov, Dimiter M.; Gospodinov, Mitko

doi:10.1088/1742-6596/558/1/012059

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…Graphene was grown by the CVD method, which is a preferred approach to grow large-area single-or few-layer graphene [37][38][39][40]. The substrate used was a Cu foil (Alfa Aesar, 99.8% purity, 25 µm thickness).…”

Section: Fabricationmentioning

confidence: 99%

Fabrication and spectroscopic characterization of graphene transparent electrodes on flexible cyclo-olefin substrates for terahertz electro-optic applications

et al. 2020

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We demonstrate graphene on flexible, low-loss, cyclo-olefin polymer films as transparent electrodes for terahertz electro-optic devices and applications. Graphene was grown by chemical vapor deposition and transferred to cyclo-olefin polymer substrates by the thermal release tape method as layers on an approximate area of 4 cm 2 . The structural and electromagnetic properties of the graphene samples as well as their spatial variation were systematically mapped by means of µRaman, terahertz time-domain and mid-infrared spectroscopy. Thanks to the small thickness and very low intrinsic absorption of the employed substrates, both high transmittance and conductivity were recorded, demonstrating the suitability of the technique for the fabrication of a new class of transparent and flexible electrodes working in the terahertz spectrum.

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Section: Fabricationmentioning

confidence: 99%

Fabrication and spectroscopic characterization of graphene transparent electrodes on flexible cyclo-olefin substrates for terahertz electro-optic applications

et al. 2020

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“…The single-layer sp 2 -hybridized carbon atom graphene with one atom thickness has been intensively studied due its physical properties, including flexibility, thermal conductivity, mechanical strength, ballistic charge transport, high carrier mobility, and ambipolar transport. There are several methods to attain single-layer graphene, such as mechanical exfoliation of graphite, epitaxial growth of graphene, and chemical vapor deposition (CVD) on a metal (Cu or Ni) foil substrate [5][6][7][8]. The most suitable and promising process to obtain single-layer graphene on a larger scale is CVD growth of graphene on a metal (Cu or Ni) substrate [5,6,9].…”

Section: Introductionmentioning

confidence: 99%

Deep-Ultraviolet (DUV)-Induced Doping in Single Channel Graphene for Pn-Junction

et al. 2021

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The electronic properties of single-layer, CVD-grown graphene were modulated by deep ultraviolet (DUV) light irradiation in different radiation environments. The graphene field-effect transistors (GFETs), exposed to DUV in air and pure O2, exhibited p-type doping behavior, whereas those exposed in vacuum and pure N2 gas showed n-type doping. The degree of doping increased with DUV exposure time. However, n-type doping by DUV in vacuum reached saturation after 60 min of DUV irradiation. The p-type doping by DUV in air was observed to be quite stable over a long period in a laboratory environment and at higher temperatures, with little change in charge carrier mobility. The p-doping in pure O2 showed ~15% de-doping over 4 months. The n-type doping in pure N2 exhibited a high doping effect but was highly unstable over time in a laboratory environment, with very marked de-doping towards a pristine condition. A lateral pn-junction of graphene was successfully implemented by controlling the radiation environment of the DUV. First, graphene was doped to n-type by DUV in vacuum. Then the n-type graphene was converted to p-type by exposure again to DUV in air. The n-type region of the pn-junction was protected from DUV by a thick double-coated PMMA layer. The photocurrent response as a function of Vg was investigated to study possible applications in optoelectronics.

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“…Among the extensively used methods to synthesize graphene as mechanical exfoliation, liquidphase exfoliation, chemical synthesis, epitaxial growth on silicon carbide, Chemical Vapor Deposition (CVD) technique becomes the most popular and promising way for scalable graphene production [8][9][10][11][12][13][14]. Recent advances of CVD growth on metal substrates (Cu, Ni, Pt, Pd, Ir, Fe) led to the availability of large-scale and high-quality graphene, with controllable number of layers, limited defects and shows the best performance of graphene as transparent conductive films.…”

Section: Introductionmentioning

confidence: 99%

“…The thermal CVD itself can be realized under low pressure (LPCVD) method or atmospheric pressure (APCVD) method commonly used for production of single, bi-layer or multilayer graphene. Although CVD growth of single layer graphene, due to its superior electrical transport properties, is highly anticipated despite being real challenging, the importance of multilayer graphene has rapidly grown because of its unique advantages for flexible optoelectronics providing ultra-flexible and transparent electrical contacts [11][12][13][14][15][16][17]. In this aspect synthesis of multilayer graphene is important issue; moreover it can provide superior electrical properties with the minor trade-off with optical transmittance reduction.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Graphene for Flexible Optoelectronic Devices

Marinova

Petrov

Napoleonov

et al. 2020

The 2nd International Online-Conference on Nanomaterials

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Graphene has attracted considerable interest as a prospective material for future electronics and opto-electronics. Here, the synthesis process of large area few layers graphene by Atmospheric Pressure Chemical Vapour Deposition (APCVD) technique is demonstrated. Quality assessments of graphene are performed and confirmed by Raman analysis and optical spectroscopy. Next, graphene was transferred on Polyethylene Terephthalate (PET) substrates and implemented as transparent conductive electrode in flexible Polymer Dispersed Liquid Crystal (PDLC) devices. The stability of the sheet resistance after 1200 bending tests of graphene/PET structure is demonstrated. Their electro-optical properties, such as voltage-dependent transmittance and flexibility behavior are measured and discussed. The obtained results open a great potential of graphene integration into the next generation Indium Tin Oxide (ITO) free flexible and stretchable optoelectronics.

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Chemical vapour deposition growth of graphene layers on metal substrates

Cited by 8 publications

References 10 publications

Fabrication and spectroscopic characterization of graphene transparent electrodes on flexible cyclo-olefin substrates for terahertz electro-optic applications

Fabrication and spectroscopic characterization of graphene transparent electrodes on flexible cyclo-olefin substrates for terahertz electro-optic applications

Deep-Ultraviolet (DUV)-Induced Doping in Single Channel Graphene for Pn-Junction

Multilayer Graphene for Flexible Optoelectronic Devices

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