The analysis of carbon bonding environment in HWCVD deposited a-SiC:H films by XPS and Raman spectroscopy

Swain, Bibhu P.

doi:10.1016/j.surfcoat.2006.02.029

Cited by 114 publications

(36 citation statements)

References 28 publications

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“…Si-Si vibrational peaks can be seen around 160 and 480 cm -1 . The Raman spectrum of amorphous silicon consists of two distinct bands, near 160 cm −1 and 480 cm −1 , associated with transverse acoustic (TA) and transverse optic (TO) vibrational modes, respectively [10]. The appearance of the TA-like phonon mode is associated with the network formation of a-Si or the onset of layer growth.…”

Section: Resultsmentioning

confidence: 99%

Current-Voltage Characteristics of ITO/p-Si and ITO/n-Si Contact Interfaces

Pethuraja¹,

Welser²,

Sood³

et al. 2012

AMPC

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We investigated the electrical contact characteristics of indium tin oxide (ITO)/doped hydrogenated amorphous silicon (a-Si:H) junctions. For efficient collection of photo-generated carriers, photovoltaic and photodetector devices require good ohmic contacts with transparent electrodes. The amorphous-Si thin films were sputter deposited on ITO coated glass substrates. As-deposited p-type a-Si:H on ITO formed nearly ohmic type contacts and further annealing did not improve the contact characteristics. On the other hand, as-deposited n-type a-Si:H on ITO formed an ohmic contact, while further annealing resulted in a Schottky type contact. The ITO contact with p-type silicon semiconductor is a robust ohmic contact for Si based optoelectronic devices.

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Section: Resultsmentioning

confidence: 99%

Current-Voltage Characteristics of ITO/p-Si and ITO/n-Si Contact Interfaces

Pethuraja¹,

Welser²,

Sood³

et al. 2012

AMPC

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“…10 shows the Si 2p and C 1s core level lines of the a-SiCN samples annealed at different temperatures. The positions of possible chemical bonds were labeled using dashed lines in the graphs, according to their energies [30,31]. Fig.…”

Section: Structure Analysismentioning

confidence: 99%

Frequency-dependent conductive behavior of polymer-derived amorphous silicon carbonitride

Wang

et al. 2015

Acta Materialia

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“…9,37 And for the Si 2p spectrum, the peaks at 101.8 eV and 102.5 eV belong to O-Si-C and Si-O bonds. 38,39 This indicates that Si elements migrate to the surface of the polymer matrix to form Si-O-Si structure of the char layer to protect the internal polymer of ZSEP in the combustion process. In addition, the formation of compounds which contain O-Si-C bond is also benecial to increasing the thermal stability and strength of the char layer.…”

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confidence: 99%

Zeolitic imidazolate framework-8 was coated with silica and investigated as a flame retardant to improve the flame retardancy and smoke suppression of epoxy resin

Wang

Liu

et al. 2018

RSC Adv.

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A material (ZIF-8@SiO 2 ) with a nuclear shell structure was synthesized to improve the flame retardancy and smoke suppression of epoxy resin (EP) through a synergetic catalytic effect. Zeolitic imidazolate framework-8 (ZIF-8) was synthesized and its surface was coated with SiO 2 by hydrolyzing tetraethyl orthosilicate. Core-shell structured ZIF-8@SiO 2 was obtained. Then ZIF-8@SiO 2 was added to EP to explore its effect of flame retardancy and smoke suppression on the EP composite. The results of a cone calorimeter test showed that the peak heat release rate, total heat release, smoke production rate and total smoke production of the material were decreased by 75.9%, 38.9%, 51.1% and 39.8%, respectively, after 2 wt% ZIF-8@SiO 2 was added to EP. Besides, through the analysis of char residue, the mechanism of ZIF-8@SiO 2 /EP's flame retardancy and smoke suppression was determined to be due to the physical barrier effect of SiO 2 and the co-effect of SiO 2 and ZnO decomposition by ZIF-8. IntroductionMetal-organic frameworks (MOFs) are porous materials comprising metal ions and organic bridging ligands.1 ZIF-8 is a metal-organic framework material with a rhombic dodecahedral structure and is synthesized in organic solvent with zinc ions and 2-methylimidazolate.2 Because ZIF-8 has a high specic surface area, high thermal stability and unique pore structure, it is widely applied in adsorption, catalysis, separation, gas storage and drug delivery.3-8 Due to the diversity of nanometer ZIF-8 materials, their new functions are being explored. Therefore, the application of ZIF-8 as a ame retardant has also attracted attention. For instance, Shi et al. prepared ZIF-8/PLA composite materials, and their research indicated that the oxygen index of the composite could reach 26.0% when 3 wt% ZIF-8 was added. The application of ZIF-8 as a new ame retardant is worthy of further exploration.In recent years, the application of silicon-containing compounds in ame retardants has been investigated by many researchers because they not only improve the ame retardant performance, but also form environment-friendly ame retardants.10 The combustion of silicon-containing polymer composites may produce SiO 2 which is easy to migrate and accumulate to the polymer surface, and generate Si-O-Si networks inside the char layer structure and ceramic-like protective material on the substrate surface to prevent the polymer's further burning and protect internal polymer. In addition, some compounds containing Si-C structure are also produced, which enhance the thermal stability of composite materials and increase the strength of the char layer.11-13 Meanwhile, SiO 2 decomposed by silicon-containing compounds is a solid acid with more acidic sites, which can catalyze the degradation of polymers and have a good co-effect of ame retardancy with metal oxides. 14 According to existing literature, 15 the use of SiO 2 coated brucite as a ame retardant has a better effect of ame retardancy compared with the simple physical mixing of SiO 2 and brucit...

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The analysis of carbon bonding environment in HWCVD deposited a-SiC:H films by XPS and Raman spectroscopy

Cited by 114 publications

References 28 publications

Current-Voltage Characteristics of ITO/p-Si and ITO/n-Si Contact Interfaces

Current-Voltage Characteristics of ITO/p-Si and ITO/n-Si Contact Interfaces

Frequency-dependent conductive behavior of polymer-derived amorphous silicon carbonitride

Zeolitic imidazolate framework-8 was coated with silica and investigated as a flame retardant to improve the flame retardancy and smoke suppression of epoxy resin

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