Raman Spectroscopy of Amorphous Carbon Prepared by Pulsed Arc Discharge in Various Gas Mixtures

Marton, Marián; Vojs, Marián; Zdravecká, E.; Himmerlich, Marcel; Haensel, Thomas; Krischok, S.; Kotlár, Mário; Michniak, Pavol; Veselý, M.; Redhammer, R

doi:10.1155/2013/467079

Cited by 61 publications

(37 citation statements)

References 23 publications

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“…Due to the comparably large number of atoms per cell, the computed vibrational spectrum is consistent with a quite congested vibrational spectrum. Overall, the Raman spectrum will probably turn out not too much different from the "D band" of amorphous carbon [32].…”

Section: The Vibrational Spectrummentioning

confidence: 97%

Protomene: A new carbon allotrope

Delodovici

Manini

Wittman

et al. 2018

Carbon

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We introduce a new carbon allotrope named protomene. Its crystal structure is hexagonal, with a fully-relaxed primitive cell involving 48 atoms. Of these, 12 atoms have the potential to switch hybridization between sp 2 and sp 3 , forming dimers. By means of DFT simulations, we have identified the equilibrium structure of protomene, and estimate that it is 2% less bound than diamond. We have also estimated the amplitude of its direct band gap to be 3 eV, and predicted the X-ray diffraction pattern and phonon modes.

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Section: The Vibrational Spectrummentioning

confidence: 97%

Protomene: A new carbon allotrope

Delodovici

Manini

Wittman

et al. 2018

Carbon

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“…Furthermore, we noticed two additional very weak, broad bands around 1500 cm −1 in the spectra of the films deposited at room temperature. It is known that in this region amorphous carbon films show similar broad Raman bands [41], which might indicate that dicyandiamide as well as melamine films start to slightly decompose during the deposition at room temperature and yield small amounts of amorphous carbon in the films. The Raman spectra of all melem films obtained (Fig.…”

Section: Resultsmentioning

confidence: 86%

Laser ablation of molecular carbon nitride compounds

Fischer¹,

Schwinghammer²,

Sondermann³

et al. 2015

Applied Surface Science

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“…Raman analysis. Raman spectroscopy is found to be an effective and accurate identification method than XRD in identifying the amorphous and crystalline nature of the several types of carbon such as diamond, graphite, diamond-like carbon, and carbon nitride, etc., and to ascertain the amount of defects in carbon materials due to the structural changes in the graphitic microstructures 39,40 . The peak position and the heights of the prepared graphitic carbon (EC-GC4, EC-GC8, and EC-GC10) samples analyzed using Raman spectra shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Pitchaiya

Eswaramoorthy

Muthukumarasamy³

et al. 2020

Sci Rep

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perovskite solar cells (pScs) composed of organic polymer-based hole-transporting materials (HtMs) are considered to be an important strategy in improving the device performance, to compete with conventional solar cells. Yet the use of such expensive and unstable HTMs, together with hygroscopic perovskite structure remains a concern -an arguable aspect for the prospect of onsite photovoltaic (PV) application. Herein, we have demonstrated the sustainable fabrication of efficient and air-stable PSCs composed of an invasive plant (Eichhornia crassipes) extracted porous graphitic carbon (ec-Gc) which plays a dual role as HTM/counter electrode. The changes in annealing temperature (~450 °C, ~850 °C and ~1000 °C) while extracting the EC-GC, made a significant impact on the degree of graphitization -a remarkable criterion in determining the device performance. Hence, the fabricated champion device-1 c : Glass/fto/c-tio 2 /mp-tio 2 /cH 3 nH 3 pbi 3−x cl x /EC-GC10@CH 3 nH 3 pbi 3−x cl x /EC-GC10) exhibited a PCE of 8.52%. Surprisingly, the introduced EC-GC10 encapsulated perovskite interfacial layer at the perovskite/HtM interface helps in overcoming the moisture degradation of the hygroscopic perovskite layer in which the same champion device-1 c evinced better air stability retaining its efficiency ~94.40% for 1000 hours. We believe that this present work on invasive plant extracted carbon playing a dual role, together as an interfacial layer may pave the way towards a reliable perovskite photovoltaic device at low-cost.Lower cost, shorter payback time and an unprecedented rise in power conversion efficiency (PCE) escalating from 3.8% in 2009 to 24.2% (2019) have turned the attention of researchers and industrial community towards perovskite solar cells (PSCs) within a decade 1-5 . Outstanding photovoltaic properties such as high charge carrier mobility, long electron-hole diffusion length, high absorption coefficient with tuneable bandgap property, low-exciton binding energy, and easy solution preparation techniques make it to compete with traditional commercial silicon solar cells 6,7 . In general, a typical PSC is composed of an electron transport layer (ETL), an active absorbing layer, a HTL, and a counter electrode. Nevertheless, the use of expensive and unstable conducting polymers based hole transporting materials (HTMs) such as (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9

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Raman Spectroscopy of Amorphous Carbon Prepared by Pulsed Arc Discharge in Various Gas Mixtures

Cited by 61 publications

References 23 publications

Protomene: A new carbon allotrope

Protomene: A new carbon allotrope

Laser ablation of molecular carbon nitride compounds

Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

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