Quantum efficiency and capture cross section of first and second excitonic transitions of single-walled carbon nanotubes measured through photoconductivity

Argyrios Malapanis; Vasili Perebeinos; Dhiraj Prasad Sinha; Everett Comfort; Ji Ung Lee

doi:10.1021/nl400939b

Quantum efficiency and capture cross section of first and second excitonic transitions of single-walled carbon nanotubes measured through photoconductivity

Argyrios Malapanis
, Vasili Perebeinos
, Dhiraj Prasad Sinha
, Everett Comfort
, Ji Ung Lee

Department of Electrical Engineering

SUNY Albany

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Comparing photoconductivity measurements, using p-n diodes formed along individual single-walled carbon nanotubes (SWNT), with modeling results, allows determination of the quantum efficiency, optical capture cross section, and oscillator strength of the first (E₁₁) and second (E₂₂) excitonic transitions of SWNTs. This is in the infrared region of the spectrum, where little experimental work on SWNT optical absorption has been reported to date. We estimate quantum efficiency (η) ∼1-5% and provide a correlation of η, capture cross section, and oscillator strength for E₁₁ and E₂₂ with nanotube diameter. This study uses the spectral weight of the exciton resonances as the determining parameter in optical measurements.

Original language	English
Pages (from-to)	3531-3538
Number of pages	8
Journal	Nano Letters
Volume	13
Issue number	8
DOIs	https://doi.org/10.1021/nl400939b
State	Published - Aug 14 2013

Keywords

carbon nanotubes
excitons
Oscillator strength
photocurrent spectra
spectral weight

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10.1021/nl400939b

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title = "Quantum efficiency and capture cross section of first and second excitonic transitions of single-walled carbon nanotubes measured through photoconductivity",

abstract = "Comparing photoconductivity measurements, using p-n diodes formed along individual single-walled carbon nanotubes (SWNT), with modeling results, allows determination of the quantum efficiency, optical capture cross section, and oscillator strength of the first (E11) and second (E22) excitonic transitions of SWNTs. This is in the infrared region of the spectrum, where little experimental work on SWNT optical absorption has been reported to date. We estimate quantum efficiency (η) ∼1-5\% and provide a correlation of η, capture cross section, and oscillator strength for E11 and E22 with nanotube diameter. This study uses the spectral weight of the exciton resonances as the determining parameter in optical measurements.",

keywords = "carbon nanotubes, excitons, Oscillator strength, photocurrent spectra, spectral weight",

author = "Argyrios Malapanis and Vasili Perebeinos and Sinha, \{Dhiraj Prasad\} and Everett Comfort and Lee, \{Ji Ung\}",

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doi = "10.1021/nl400939b",

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TY - JOUR

T1 - Quantum efficiency and capture cross section of first and second excitonic transitions of single-walled carbon nanotubes measured through photoconductivity

AU - Malapanis, Argyrios

AU - Perebeinos, Vasili

AU - Sinha, Dhiraj Prasad

AU - Comfort, Everett

AU - Lee, Ji Ung

PY - 2013/8/14

Y1 - 2013/8/14

N2 - Comparing photoconductivity measurements, using p-n diodes formed along individual single-walled carbon nanotubes (SWNT), with modeling results, allows determination of the quantum efficiency, optical capture cross section, and oscillator strength of the first (E11) and second (E22) excitonic transitions of SWNTs. This is in the infrared region of the spectrum, where little experimental work on SWNT optical absorption has been reported to date. We estimate quantum efficiency (η) ∼1-5% and provide a correlation of η, capture cross section, and oscillator strength for E11 and E22 with nanotube diameter. This study uses the spectral weight of the exciton resonances as the determining parameter in optical measurements.

AB - Comparing photoconductivity measurements, using p-n diodes formed along individual single-walled carbon nanotubes (SWNT), with modeling results, allows determination of the quantum efficiency, optical capture cross section, and oscillator strength of the first (E11) and second (E22) excitonic transitions of SWNTs. This is in the infrared region of the spectrum, where little experimental work on SWNT optical absorption has been reported to date. We estimate quantum efficiency (η) ∼1-5% and provide a correlation of η, capture cross section, and oscillator strength for E11 and E22 with nanotube diameter. This study uses the spectral weight of the exciton resonances as the determining parameter in optical measurements.

KW - carbon nanotubes

KW - excitons

KW - Oscillator strength

KW - photocurrent spectra

KW - spectral weight

UR - https://www.scopus.com/pages/publications/84881577912

U2 - 10.1021/nl400939b

DO - 10.1021/nl400939b

M3 - Article

AN - SCOPUS:84881577912

SN - 1530-6984

VL - 13

SP - 3531

EP - 3538

JO - Nano Letters

JF - Nano Letters

IS - 8

ER -

Quantum efficiency and capture cross section of first and second excitonic transitions of single-walled carbon nanotubes measured through photoconductivity

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Keywords

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