Prevention of Water Permeation by Strong Adhesion Between Graphene and SiO<sub>2</sub> Substrate

Jung, Won Hoon; Park, Joonkyu; Yoon, Taeshik; Kim, Taek Soo; Kim, Soohyun; Han, Chang Soo

doi:10.1002/smll.201302729

Cited by 34 publications

(33 citation statements)

References 56 publications

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“…This copper foil attached to SiO 2 surface was simultaneously etched by 0.1 m ammonium persulfate (APS‐100) without any carrier materials as shown in Figure a. After etching process, we subsequently conducted thermal electrobonding annealing process to attach monolayer graphene more conformally to the shape of nanochannels as shown in Figure S2 (Supporting Information).…”

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confidence: 99%

A Novel Fabrication of 3.6 nm High Graphene Nanochannels for Ultrafast Ion Transport

Jung

Kim

et al. 2017

Advanced Materials

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confidence: 99%

A Novel Fabrication of 3.6 nm High Graphene Nanochannels for Ultrafast Ion Transport

Jung

Kim

et al. 2017

Advanced Materials

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“…Figure b illustrates the schematic diagram of the heat transfer during the interface from the heating layer to the heated object. Here, the directly grown graphene on target substrate has a relatively smaller vacancy than transferred graphene . Therefore, the heating rate of the GMH is expected to be higher than the TGH.…”

Section: Resultsmentioning

confidence: 99%

Ultrahigh Temperature Graphene Molecular Heater

Huang

Liu

Tan

et al. 2018

Adv Materials Inter

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for metal films, [10] which are the basic building blocks of traditional heaters, after reducing the thickness strongly inhibits the realization of molecular heaters. Therefore, it is of great importance to find a satisfactory molecular building block with thicknesses controlled at the atomic level and unique electrical properties to achieve the construction of molecular heater.Graphene, which can be considered as a polycyclic aromatic hydrocarbon molecule with strictly atomic thickness, has been known as an excellent conductor of both heat and electricity. [11] Regarding that the electrothermal conversion of the heater is driven by the collision of charged particles in the electric field, also known as Joule heating, the heat performance is determined by the current flow and the intrinsic resistance of it. The extremely high current density [12] (≈2 × 10 9 A cm −2 ) and thermal conductivity [13] (≈5300 W m −1 K −1 ), as well as relatively low thermal loss, [14] where the convective heat-transfer coefficient is 12.4 W cm −2 °C −1 , of graphene could provide an anticipated heating performance, thus making the graphene molecule a promising building block of the molecular heater. However, the catalytic-growth characteristic of graphene makes it hard for direct growth on insulated substrate, thus the as-fabricated films suffer from the significant drawback of low crystallinity and nonuniformity. [15][16][17] Meanwhile, the transferred graphene is also criticized because of its cracks and residues, which leads to decayed electrical and thermal properties. Therefore, the heat temperature was limited to ≈200 °C in previous graphene-based heaters. [18] Here, graphene molecules with thicknesses controlled at the atomic level were directly grown on ceramic substrates, where the achievement of high-quality and uniform distribution characteristics had been demonstrated successfully. Graphene molecular heater (GMH), which exhibited extremely high heating temperature up to ≈400 °C only at a very low input voltage of 4.3 V, based on 1-nm-thick graphene molecule was first achieved and its heating characteristics were systematically explored, including the Joule heating efficiency, temperature distribution, and heating rate, where all the heating performances exhibit promising characteristics. What's more, the heating temperature of the GMH could be further improved to 600 °C, which was far beyond the oxidation temperature of graphene molecule in the atmosphere, after being encapsulated by hexagon boron nitride (h-BN) molecule. Thus, we believe the as-constructed GMH could further enrich the Although a number of molecular devices have been fabricated successfully, molecular heater still keeps blank. It is of great importance to find a satisfactory molecular building block with thicknesses controlled at the atomic level and outstanding electrical properties to achieve the construction of molecular heater. Graphene, a polycyclic aromatic hydrocarbon molecule with strictly atomic thickness, is known as a superior heat and electricit...

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“…These values are compatible to 4–6 layers for FLG and 1–2 layers for GBD, in agreement with the results extracted from Raman spectroscopy. The measured thickness values take into account of the presence of water buffers between the stack and SiO 2 and between each layers of the stack . We measured the UV–vis absorption of FLG/GBD stack transferred onto quartz substrate and the result has been compared with the absorption of graphene (Figure c).…”

Section: Resultsmentioning

confidence: 99%

The Role of Graphene‐Based Derivative as Interfacial Layer in Graphene/n‐Si Schottky Barrier Solar Cells

Gnisci¹,

Faggio²,

Lancellotti

et al. 2018

Physica Status Solidi (a)

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Schottky‐barrier solar cells (SBSCs) represent low‐cost candidates for photovoltaics applications. The engineering of the interface between absorber and front electrode is crucial for reducing the dark current, blocking the majority carriers injected into the electrode, and reducing surface recombination. The presence of tailored interfacial layers between the metal electrode and the semiconductor absorber can improve the cell performance. In this work, the interface of a graphene/n‐type Si SBSC by introducing a graphene‐based derivative (GBD) layer meant to reduce the Schottky‐barrier height (SBH) and ease the charge collection are engineered. The chemical vapor deposition (CVD) parameters are tuned to obtain the two graphene films with different structure and electrical properties: few‐layer graphene (FLG) working as transparent conductive electrode and GBD layer with electron‐blocking and hole‐transporting properties. Test SBSCs are fabricated to evaluate the effect of the introduction of GBD as interlayer into the FLG/n‐Si junction. The GBD layer reduces the recombination at the interface between graphene and n‐Si, and improves the external quantum efficiency (EQE) with optical bias from 50 to 60%. The FLG/GBD/n‐Si cell attains a power conversion efficiency (PCE) of ≈5%, which increase to 6.7% after a doping treatment by nitric acid vapor.

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Prevention of Water Permeation by Strong Adhesion Between Graphene and SiO₂ Substrate

Cited by 34 publications

References 56 publications

A Novel Fabrication of 3.6 nm High Graphene Nanochannels for Ultrafast Ion Transport

A Novel Fabrication of 3.6 nm High Graphene Nanochannels for Ultrafast Ion Transport

Ultrahigh Temperature Graphene Molecular Heater

The Role of Graphene‐Based Derivative as Interfacial Layer in Graphene/n‐Si Schottky Barrier Solar Cells

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Prevention of Water Permeation by Strong Adhesion Between Graphene and SiO2 Substrate

Cited by 34 publications

References 56 publications

A Novel Fabrication of 3.6 nm High Graphene Nanochannels for Ultrafast Ion Transport

A Novel Fabrication of 3.6 nm High Graphene Nanochannels for Ultrafast Ion Transport

Ultrahigh Temperature Graphene Molecular Heater

The Role of Graphene‐Based Derivative as Interfacial Layer in Graphene/n‐Si Schottky Barrier Solar Cells

Contact Info

Product

Resources

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Prevention of Water Permeation by Strong Adhesion Between Graphene and SiO₂ Substrate