Publisher's Note: Charge transfer and Fermi level shift in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-doped single-walled carbon nanotubes [Phys. Rev. B<b>71</b>, 205423 (2005)]

Zhou, Wenwen; Vavro, Juraj; Nemes, N. M.; Fischer, J. E.

doi:10.1103/physrevb.71.239903

Cited by 57 publications

(153 citation statements)

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“…The G band position for porous graphene was observed at ≈1582 cm −1 , which can be compared with the G position of pristine graphene (≈1580 cm −1 ) in our sample. This upshift in the G band position further confirms the hole‐doping in the NPG by the formation of oxygen dangling bonds with graphene, as reported by previous research …”

Section: Resultssupporting

confidence: 90%

“…This upshift in the G band position further confi rms the holedoping in the NPG by the formation of oxygen dangling bonds with graphene, as reported by previous research. [ 27 ] Figure 4 shows SEM images of the NPG obtained using our AAO templates with a periodicity of 106.11.8 nm. The histograms resulting from the statistical analysis show that a series of NPG samples with adjustable pores diameter have been achieved.…”

Section: Raman Studies For Few Layers and Np Graphenementioning

confidence: 99%

“…However, to ensure viable applications, the optical versus electrical characteristics of graphene fi lms need to be further improved and tuned by engineering of two critical parameters, i.e., sheet resistance and optical transparency. [24][25][26][27][28] Graphene fi lms having high conductivity and low optical loss may be engineered by doping or surface modifi cations.…”

Section: Introductionmentioning

confidence: 99%

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Unusually High Optical Transparency in Hexagonal Nanopatterned Graphene with Enhanced Conductivity by Chemical Doping

Choi

Kuru

Choi

et al. 2015

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Graphene has received appreciable attention for its potential applications in flexible conducting film due to its exceptional optical, mechanical, and electrical properties. However increasing transmittance of graphene without sacrificing the electrical conductivity has been difficult. The fabrication of optically highly transparent (≈98%) graphene layer with a reasonable electrical conductivity is demonstrated here by nanopatterning and doping. Anodized aluminium oxide nanomask prepared by facile and simple self-assembly technique is utilized to produce an essentially hexagonally nanopatterned graphene. The electrical resistance of the graphene increases significantly by a factor of ≈15 by removal of substantial graphene regions via nanopatterning into hexagonal array pores. However, the use of chemical doping on the nanopatterned graphene almost completely recovers the lost electrical conductivity, thus leading to a desirably much more optically transparent conductor having ≈6.9 times reduced light blockage by graphene material without much loss of electrical conductivity. It is likely that the availability of large number of edges created in the nanopatterned graphene provides ideal sites for chemical dopant attachment, leading to a significant reduction of the sheet resistance. The results indicate that the nanopatterned graphene approach can be a promising route for simultaneously tuning the optical and electrical properties of graphene to make it more light-transmissible and suitable as a flexible transparent conductor.

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Section: Resultssupporting

confidence: 90%

Section: Raman Studies For Few Layers and Np Graphenementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unusually High Optical Transparency in Hexagonal Nanopatterned Graphene with Enhanced Conductivity by Chemical Doping

Choi

Kuru

Choi

et al. 2015

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“…Second, the intrinsic SWNT optical transitions are bleached after acid treatment, indicating p-type doping of the SWNT film. [18,19] Also consistent with p-type doping of the SWNT film is the appearance of a ''free carrier'' absorbance at low energies ( Fig. 1e), arising from intraband transitions of valence-band holes.…”

mentioning

confidence: 67%

“…1e), arising from intraband transitions of valence-band holes. [18] Furthermore, the film changes from completely insulating to highly conductive after HNO 3 treatment. Thus, the nitric acid treatment effectively removes the CMC host, allowing the SWNTs to form conducting nanotube-nanotube junctions, and also dopes the SWNTs in a single step.…”

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confidence: 99%

Ultrasmooth, Large‐Area, High‐Uniformity, Conductive Transparent Single‐Walled‐Carbon‐Nanotube Films for Photovoltaics Produced by Ultrasonic Spraying

et al. 2009

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Transparent conducting (TC) films of single-walled carbon nanotubes (SWNTs) have the potential to replace conventional TC oxides in a wide variety of optoelectronic devices. [1][2][3][4][5] TC-SWNT films are particularly attractive for photovoltaics (PV) due to their high transparency over much of the solar spectrum, excellent electrical conductivity, and the potential for inexpensive roll-to-roll processing. SWNT films have been used, by us and others, in cadmium telluride, [6] copper indium gallium diselenide, [7] and organic PV (OPV) devices. [8][9][10] In several reports, SWNTelectrodes for OPV have been prepared by filtering a sodium dodecyl sulfate (SDS)-stabilized dispersion of SWNTs to form a thin film. [9,10] The film can be released by dissolution of the filter, and then transferred to a transparent substrate.[11] This so-called ''transfer method'' produces highly transparent films with excellent conductivity, but the films possess irregular morphologies and significant roughness, which can lead to short-circuits and overall poor reproducibility during device fabrication.[12] Moreover, the process is not scalable. TC-SWNT films have also been produced for optical and electrical studies by air-brush spraying using surfactant-stabilized SWNT inks. Such films are inhomogeneous because SWNTs sprayed from surfactant solutions agglomerate on heated substrates. To move TC-SWNT electrodes beyond the proof-of-concept stage for PV and other optoelectronic applications, methods are required for producing large-area, transparent, conducting SWNT films that are smooth and homogeneous over large areas.Here, we report methods to prepare SWNT films with high transparency, electrical conductivity, and uniformity, with exceptionally low surface roughness, on arbitrarily large (6 inch Â 6 inch) substrates by ultrasonic spraying. A side-by-side comparison of OPV devices fabricated on SWNT and indiumdoped tin oxide (ITO) electrodes showed very good performance with energy-conversion efficiencies of $3.1 and 3.6%, respectively, under AM 1.5 illumination. Several factors are critical to the success of the approach. First, we prepared aqueous SWNT dispersions using a high-molecular-weight (MW $90 000) polymeric derivative of cellulose (sodium carboxymethyl cellulose (CMC)). CMC has been previously reported as an excellent agent for dispersing SWNTs in water, [13] and transparent films have been drop-cast, [14] but this is the first report of CMC-based dispersions for spraying SWNT films. A second advance is the use of ultrasonic spraying, which, when combined with the CMC-based dispersions, permits precise amounts of SWNTs to be reproducibly and uniformly dispensed over arbitrarily large areas. In fact, by measuring the weight and optical properties of films as a function of the number of deposited layers, the SWNT absorption coefficient could be accurately determined. Finally, we used SWNTs produced by laser vaporization (LV), which have lower defect densities [15,16] than tubes produced by chemical vapor deposition (CVD). Th...

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Glucose Electrooxidation

Opałło¹,

Dolinska²

2018

Encyclopedia of Interfacial Chemistry

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Publisher's Note: Charge transfer and Fermi level shift inp-doped single-walled carbon nanotubes [Phys. Rev. B71, 205423 (2005)]

Cited by 57 publications

References 0 publications

Unusually High Optical Transparency in Hexagonal Nanopatterned Graphene with Enhanced Conductivity by Chemical Doping

Unusually High Optical Transparency in Hexagonal Nanopatterned Graphene with Enhanced Conductivity by Chemical Doping

Ultrasmooth, Large‐Area, High‐Uniformity, Conductive Transparent Single‐Walled‐Carbon‐Nanotube Films for Photovoltaics Produced by Ultrasonic Spraying

Glucose Electrooxidation

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