Quantum Efficiency and Capture Cross Section of First and Second Excitonic Transitions of Single-Walled Carbon Nanotubes Measured through Photoconductivity

Malapanis, Argyrios; Perebeinos, Vasili; Sinha, Durganand; Comfort, Everett; Lee, Ji Ung

doi:10.1021/nl400939b

Cited by 37 publications

(59 citation statements)

References 54 publications

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“…It is important to note however, that unlike previously reported absorption cross sections for the E 11 absorption peak (σ 11 ) 28,35,36 , the values reported here are dependent on the SWCNT length distribution, as two SWNT preparations with varying length distributions may contain equal concentrations of carbon atoms despite containng different numbers of nanotubes per unit volume. This highlights the importance of applying the developed method to individual SWCNT preparations.…”

Section: Resultscontrasting

confidence: 79%

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

et al. 2017

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Electronic and biological applications of carbon nanotubes can be highly dependent on the species (chirality) of nanotube, purity, and concentration. Existing bulk methods, such as absorbance spectroscopy can quantify SP2 carbon based on spectral bands, but nanotube length distribution, defects, and carbonaceous impurities can complicate quantification of individual particles. We present a general method to relate the optical density of a photoluminescent nanotube sample to the number of individual nanotubes. By acquiring 3-dimensional images of nanotubes embedded in a gel matrix with a reducing environment, we quantified the individual nanotubes in a volume, resulting in a measurement of all emissive nanotubes. Via spectral imaging, we assessed structural impurities and precisely determined molar concentrations of the (8,6) and (9,4) nanotube species. We developed an approach to obtain the molarity of any structurally-enriched semiconducting single-walled carbon nanotube preparation on a per-nanotube basis.

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Section: Resultscontrasting

confidence: 79%

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

et al. 2017

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“…(5,5)−(5,5),(8,8)−(8,8),(9,9)−(9,9), (10,10)−(10,10),(15,15)−(15,15), which are all metallic carbon nanotubes and have the same chiralities of armchair type (the specific structural…”

mentioning

confidence: 99%

Nanoscale Soldering of Axially Positioned Single-Walled Carbon Nanotubes: A Molecular Dynamics Simulation Study

Cui

Yang

Zhou

et al. 2014

ACS Appl. Mater. Interfaces

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The miniaturization of electronics devices into the nanometer scale is indispensable for next-generation semi-conductor technology. Carbon nanotubes (CNTs) are considered to be the promising candidates for future interconnection wires. To study the carbon nanotubes interconnection during nanosoldering, the melting process of nanosolder and nanosoldering process between single-walled carbon nanotubes are simulated with molecular dynamics method. As the simulation results, the melting point of 2 nm silver solder is about 605 K because of high surface energy, which is below the melting temperature of Ag bulk material. In the nanosoldering process simulations, Ag atoms may be dragged into the nanotubes to form different connection configuration, which has no apparent relationship with chirality of SWNTs. The length of core filling nanowires structure has the relationship with the diameter, and it does not become longer with the increasing diameter of SWNT. Subsequently, the dominant mechanism of was analyzed. In addition, as the heating temperature and time, respectively, increases, more Ag atoms can enter the SWNTs with longer length of Ag nanowires. And because of the strong metal bonds, less Ag atoms can remain with the tight atomic structures in the gap between SWNT and SWNT. The preferred interconnection configurations can be achieved between SWNT and SWNT in this paper.

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“…We here consider the geometrical cross section of the nanotube, in order to evaluate the absorption efficiency, instead of using the optical absorption cross section per carbon atom. 19 The calculated power conversion efficiency reaches 0.027 for excitation on the E11 and is one order of magnitude lower for off resonance excitation. In order to conclude that the difference in power conversion efficiency for the different excitation energies is not an effect of the increased absorption on the E11 resonance, the data were corrected for the absorption efficiency.…”

Section: Resultsmentioning

confidence: 90%

Single carbon nanotube photovoltaic device

Barkelid

Zwiller

2013

Journal of Applied Physics

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Here we present photocurrent measurements on a single suspended carbon nanotube p-n junction. The p-n junction was induced by electrostatic doping by local gates, and the E11 and E22 resonances in the nanotube could be probed using photocurrent spectroscopy. Current-voltage characteristics were recorded, revealing an enhanced optoelectronic response on resonance. The internal power conversion efficiency for the nanotube diode was extracted on and off resonance with the E11 and E22, and a large internal power conversion efficiency was observed. An internal efficiency of up to 23% is reported for the E11, showing the potential of carbon nanotubes to be used as the active element in photovoltaic devices. Finally, a photovoltaic device is proposed which exploits this enhanced efficiency. V C 2013 AIP Publishing LLC.

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Quantum Efficiency and Capture Cross Section of First and Second Excitonic Transitions of Single-Walled Carbon Nanotubes Measured through Photoconductivity

Cited by 37 publications

References 54 publications

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

Single Nanotube Spectral Imaging To Determine Molar Concentrations of Isolated Carbon Nanotube Species

Nanoscale Soldering of Axially Positioned Single-Walled Carbon Nanotubes: A Molecular Dynamics Simulation Study

Single carbon nanotube photovoltaic device

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