Cathodoluminescence and electron field emission of boron-doped a-C:N films

Hsieh, Wei-Jen; Lai, Shih-Hsiang; Chan, L.; Chang, Kai-Chun; Shih, Han C.

doi:10.1016/j.carbon.2004.11.013

Cited by 18 publications

(8 citation statements)

References 31 publications

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“…2(b) shows the enlarged C1s core-level peaks of XPS spectra for the a-C:N films deposited with different rf-powers. The C1s spectrum is deconvoluted into three peaks located at 284.6, 285.5, and 287.6 eV, which are contributed by the sp 2 C-C, sp 2 C-N, and sp 3 C-N bonds, respectively [15]. Notably, the peak at 285.7 eV is reported to be the sp 3 C-C bonding [16].…”

Section: Methodsmentioning

confidence: 99%

Effects of radio frequency powers on the characteristics of a-C:N/p-Si photovoltaic solar cells prepared by plasma enhanced chemical vapor deposition

Chu

Shiue

2008

Surface and Coatings Technology

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Section: Methodsmentioning

confidence: 99%

Effects of radio frequency powers on the characteristics of a-C:N/p-Si photovoltaic solar cells prepared by plasma enhanced chemical vapor deposition

Chu

Shiue

2008

Surface and Coatings Technology

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“…The predominate asymmetric C 1s peak, shown in Figure b, indicates the existence of C–N, C–B, and/or C–O bonds in addition to C–C bonds. The C 1s spectrum could be deconvoluted into four peaks at 283.5, 284.7, 286.3, and 288.4 eV; these were assigned to C–B, sp 2 C=C, C–N, and/or C–O bonds, and π–π sp 2 satellite transitions respectively . The B1s core level can be divided into maximum 4 peaks of B–O (193 eV), BCO 2 (192 eV), B–N (190.6 eV), and B–C (189.5 eV) (Figure c) .…”

Section: Nanoparticle Porositymentioning

confidence: 99%

“…The relatively large amount of B‐N bonding indicates that N from the reaction gas reacts preferentially with B over C when B is present. The high resolution N 1s peak can be deconvoluted into 3 components (Figure d); N‐6 (398.6 eV), N‐5 (400.6e V), and N‐Q (401.6 eV) . N‐6 corresponds to pyridinic substitution in the carbon lattice, N‐5 to pyrrolic substitution in the carbon lattice and/or B–N bonding, and N‐Q to graphitic substitution in the carbon lattice.…”

Section: Nanoparticle Porositymentioning

confidence: 99%

Hierarchical Design for Fabricating Cost‐Effective High Performance Supercapacitors

Kim¹,

Buchholz²,

Casillas

et al. 2014

Adv Funct Materials

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The salient feature of a supercapacitor is its ability to deliver much higher power density than a battery. A hierarchical design and a cost-effective approach to fabricate high performance supercapacitors using functional carbon nano-particles is reported. A special arc synthesis method is used to produce amorphous/crystalline composite with nitrogen and boron co-doped high charge density carbon nanoparticles. Upon etch removal of the amorphous phase in the composite nanoparticle, a crystalline carbon framework emerges, consisting of a mixture of nano-graphitic sheets mostly in the middle and single nanohorns distributed around the surface of the nanoparticle. These nanoparticles have large internal/external surfaces with subnano channels and sharp nano-tips for high speed charge transport and local charge accumulation. To deliver high power density, the internal resistance of the device is reduced by assembling the nanoparticles via electro-spraying and compacting them into dense fi lms (without any binder) under 700 MPa of pressure before supercapacitor assembly. Taken together, the hierarchical processed supercapacitor has a very high (compared to literature values) power density of nearly 4.5 kW cm −3 and a respectable energy density of 2.45 mWh cm −3 . Combining these carbon nanoparticles with large area spraying coating, it can lead to a cost-effective production of high performance supercapacitors. IntroductionAdvances in the development of renewable energy sources and energy storage systems have propelled the need to design and fabricate ever higher charge-density nanoparticles (HCDN). To this end it is desirable to design a nanostructure with a large surface area for a given total volume or mass. Equally important is the consideration of surface reactivity and the availability of nanoscale channels for atomic/charged species to access HCDN were part of our design consideration. Below we start with the study of HCDN synthesis and characterization at each length scale, and then followed by a discussion on supercapacitor fabrication and its performance. Results and Discussion HCDN Fabrication and Structural AnalysisThe fi rst goal is to synthesize a HCDN with near spherical shape consisting of doped crystalline frame-work having numerous internal nano-channels and sharp tips for the transport and accumulation of charges. To achieve such an architecture the following two-step processing sequence was taken to synthesize the unique HCDN: First, a composite nanoparticle was synthesized consisting of fi ne lamella layers of crystalline carbon sandwiched between amorphous layers of nitride and/ or carbide materials. Second, the amorphous layers of the composite nanoparticle were selectively etched away by heating the sample in air at 450˚C to produce the desired structure.DC arcs have been extensively used in nano carbon studies. [10][11][12][13][14] To perform the fi rst step, we used a DC arc that was confi gured as a high temperature furnace where a hole in the cathode serves as a crucible which can be fi ll...

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“…It can also be used as a parameter for sp 3 content, and a small value of I D /I G ratio corresponds to a higher sp 3 content. [38] Therefore, the changes of I D /I G may reflect the fraction of boron-or nitrogen-bound sp 3 -coordinated carbons in the films. An increase in the carbon concentration of B-C-N-H film leads to an increase of sp 3 carbon hybridization.…”

Section: Ftir Analysismentioning

confidence: 99%

“…Apart from being predicted variable band-gap semiconductors, [1] B-C-N compounds may also prove to be useful as electronic devices, [2,3] transparent hard coatings, [4,5] wear-resistant coatings [6 -8] and coatings providing high resistance to oxidation at high temperatures [9] They are expected to have a great technological importance compared to h-BN (low hardness), c-BN (high internal stress, poor adhesion), graphite (low hardness and oxidation resistance) and diamond (low oxidation resistance). [10] The prominent properties of the B-C-N compounds strongly depend on their composition and structure.…”

Section: Introductionmentioning

confidence: 99%

The chemical composition and bonding structure of B–C–N–H thin films deposited by reactive magnetron sputtering

Chen

Yang

Zhang

2009

Surface & Interface Analysis

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Cathodoluminescence and electron field emission of boron-doped a-C:N films

Cited by 18 publications

References 31 publications

Effects of radio frequency powers on the characteristics of a-C:N/p-Si photovoltaic solar cells prepared by plasma enhanced chemical vapor deposition

Effects of radio frequency powers on the characteristics of a-C:N/p-Si photovoltaic solar cells prepared by plasma enhanced chemical vapor deposition

Hierarchical Design for Fabricating Cost‐Effective High Performance Supercapacitors

The chemical composition and bonding structure of B–C–N–H thin films deposited by reactive magnetron sputtering

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