Exploration of graphene oxide nanoribbons as excellent electron conducting network for third generation solar cells

Kusuma, J.; Balakrishna, R. Geetha; Patil, Siddappa A.; Jyothi, M.S.; Chandan, H.R.; Shwetharani, R.

doi:10.1016/j.solmat.2018.01.039

Cited by 90 publications

(24 citation statements)

References 44 publications

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“…The sheets were allowed for complete oxidation in presence of hydrogen peroxide and were given multiple acid and water wash for purification. GNR was synthesized by unzipping of MWCNTs [35] by an efficient chemical oxidation process. Phosphoric acid was used as second acid along with KMnO 4 and H 2 SO 4 to mask the diol group control and thus control vacancies.…”

Section: Methodsmentioning

confidence: 99%

1D GNR‐PPy Composite for Remarkably Sensitive Detection of Heavy Metal Ions in Environmental Water**

et al. 2022

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The work reported here exploits the extraordinary features of graphene nanoribbons (GNR) and well‐known conductive polypyrrole (PPy) polymer to develop a very good electrochemically active composite for sensing metal ions. A strong hydrogen bond and π‐π interaction between the two components facilitates an enhanced conductive 3D network that has been used to design and fabricate an electrochemical sensor for selective and sensitive determination of Pb2+ ions by differential pulse voltammetry (DPV). The probe has been further extended to simultaneously detect Zn2+, Cd2+, As2+, Cu2+, Pb2+, Fe2+ and Hg2+ ions. Moreover, the larger effective surface area, higher porosity and chelating groups of composite promotes better adsorption‐stripping process of Pb2+ ions, leading to a high detection limit of 0.03 nM with a sensitivity of 0.7557 μA μM−1cm−2. This study is extended to detect heavy metal ions in lake water samples, demonstrating promising applications in real time (environmental) samples, and the study shows a deviation of ≈10 %, when validated with atomic absorption spectroscopy studies.

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Section: Methodsmentioning

confidence: 99%

1D GNR‐PPy Composite for Remarkably Sensitive Detection of Heavy Metal Ions in Environmental Water**

et al. 2022

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“…Graphene is a single-atom layer material bonded by a carbon atom in a hexagonal form. This unique structure offers graphene excellent optical properties of controllable light absorption, high electron mobility (200,000 cm 2 V -1 s -1 ), uniform light absorption rate of 2.3 % in a broadband [12][13][14][15][16][17][18][19][20]. These favorable properties offer the graphene good potentials in high speed, small footprint and low power consumption modulator applications [21][22][23][24].…”

Section: Introductionmentioning

confidence: 98%

Polarization-Insensitive Electro-Absorption Modulator Based on Graphene-Silicon Nitride Hybrid Waveguide

Chen

Fan

et al. 2021

IEEE Photonics J.

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Wideband and polarization-insensitive operation are key issues for electro-optic modulators. An electro-absorption modulator based on graphene-silicon nitride hybrid waveguide has been proposed. Geometric parameters are investigated through finite element method to enhance the interaction between the optical mode and the graphene. For a 200-µm -long hybrid waveguide, a modulation depth (MD) of 20 dB can be obtained when Femi level varies from 0.2 to 0.6 eV. The MD difference between the transversal electric polarization and transversal magnetic polarization (ΔMD) can be restrained to 4×10 -3 dB at 1550 nm. A low average ΔMD of 0.2 dB within the wavelength range from 1100 to 1645 nm can be obtained. The 3 dB-bandwidth of 53 GHz and a power consumption is 0.687 pJ/bit can be obtained. The proposed modulator has potentials for on-chip signal processing.

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“…Recently, many research works have been devoted to high speed EO materials that are compatible to CMOS processing [3][4][5]. Graphene, with its unique optical and electrical properties, is regarded as a promising competitor in EO applications [6][7][8][9][10][11][12][13][14]. Many graphene modulators have been theoretically demonstrated or experimentally proved [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Design of a Graphene Modulator Based on a Hybrid Plasmonic Horizontal Slot Waveguide

Chen

Dong

et al. 2021

IEEE Photonics J.

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An electrical absorption graphene modulator based on hybrid plasmonic waveguide is theoretically demonstrated. The sidewall scattering loss is mostly restrained by the vertical metalinsulator-silicon (MIS) waveguide structure. The patterned Si3N4 (SiN) can both serve as the mask and the insulation layer, which offers the direct formation of silicon stripe by thermal oxidization. The metal cap layer utilized as an electrode is favorable to improve the frequency response. By finite element method (FEM) optimization of waveguide dimensions, the 700 nm-wide optical 3 dB-bandwidth that ranges from 1200 to 1900 nm can be obtained at the modulation length of 30 μm. The propagation loss is reduced to 0.088 dB/μm. The modulation depth and power consumption are calculated to be 0.509 dB/μm and 61.3 fJ/bit, respectively. The estimated electrical 3 dB-bandwidth of 330 GHz promises the proposed modulator potentials in next generation on-chip optical signal processing.

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Exploration of graphene oxide nanoribbons as excellent electron conducting network for third generation solar cells

Cited by 90 publications

References 44 publications

1D GNR‐PPy Composite for Remarkably Sensitive Detection of Heavy Metal Ions in Environmental Water**

1D GNR‐PPy Composite for Remarkably Sensitive Detection of Heavy Metal Ions in Environmental Water**

Polarization-Insensitive Electro-Absorption Modulator Based on Graphene-Silicon Nitride Hybrid Waveguide

Design of a Graphene Modulator Based on a Hybrid Plasmonic Horizontal Slot Waveguide

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