Absorption Cross-Section and Related Optical Properties of Colloidal InAs Quantum Dots

Pingrong Yu; Matthew C. Beard; Randy J. Ellingson; Suzanne Fernere; Calvin Curtis; John Drexler; Fred Luiszer; Arthur J. Nozik

doi:10.1021/jp046127i

Absorption Cross-Section and Related Optical Properties of Colloidal InAs Quantum Dots

Pingrong Yu, Matthew C. Beard, Randy J. Ellingson, Suzanne Fernere, Calvin Curtis, John Drexler, Fred Luiszer, Arthur J. Nozik

Chemistry and Nanoscience

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

145 Scopus Citations

Abstract

We report the absorption cross-section of colloidal InAs quantum dots of mean radii from 1.6 to 3.45 nm. We find excellent agreement between the measured results and calculated values based on a model of small-particle light absorption. The absorption cross-section per dot is 6.2 × 10 ^-16R ³ cm ² at 2.76 eV and 3.15 × 10 ^-16R ^1.28 cm ² at the first-exciton absorption peak, with the dot radius R in nm. We find that the per-quantum-dot particle oscillator strength of the first-exciton transition is constant for all sizes studied. The radiative lifetime of the first exciton calculated from the oscillator strength increases with dot size and ranges from 4 ns for the smallest dots to 14 ns for the largest ones.

Original language	American English
Pages (from-to)	7084-7087
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	109
Issue number	15
DOIs	https://doi.org/10.1021/jp046127i https://doi.org/10.1021/jp046127i
State	Published - 2005

NREL Publication Number

NREL/JA-590-38431

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title = "Absorption Cross-Section and Related Optical Properties of Colloidal InAs Quantum Dots",

abstract = "We report the absorption cross-section of colloidal InAs quantum dots of mean radii from 1.6 to 3.45 nm. We find excellent agreement between the measured results and calculated values based on a model of small-particle light absorption. The absorption cross-section per dot is 6.2 × 10 -16R 3 cm 2 at 2.76 eV and 3.15 × 10 -16R 1.28 cm 2 at the first-exciton absorption peak, with the dot radius R in nm. We find that the per-quantum-dot particle oscillator strength of the first-exciton transition is constant for all sizes studied. The radiative lifetime of the first exciton calculated from the oscillator strength increases with dot size and ranges from 4 ns for the smallest dots to 14 ns for the largest ones.",

author = "Pingrong Yu and Beard, {Matthew C.} and Ellingson, {Randy J.} and Suzanne Fernere and Calvin Curtis and John Drexler and Fred Luiszer and Nozik, {Arthur J.}",

year = "2005",

doi = "10.1021/jp046127i",

language = "American English",

volume = "109",

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journal = "Journal of Physical Chemistry B",

issn = "1520-6106",

publisher = "American Chemical Society",

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T1 - Absorption Cross-Section and Related Optical Properties of Colloidal InAs Quantum Dots

AU - Yu, Pingrong

AU - Beard, Matthew C.

AU - Ellingson, Randy J.

AU - Fernere, Suzanne

AU - Curtis, Calvin

AU - Drexler, John

AU - Luiszer, Fred

AU - Nozik, Arthur J.

PY - 2005

Y1 - 2005

N2 - We report the absorption cross-section of colloidal InAs quantum dots of mean radii from 1.6 to 3.45 nm. We find excellent agreement between the measured results and calculated values based on a model of small-particle light absorption. The absorption cross-section per dot is 6.2 × 10 -16R 3 cm 2 at 2.76 eV and 3.15 × 10 -16R 1.28 cm 2 at the first-exciton absorption peak, with the dot radius R in nm. We find that the per-quantum-dot particle oscillator strength of the first-exciton transition is constant for all sizes studied. The radiative lifetime of the first exciton calculated from the oscillator strength increases with dot size and ranges from 4 ns for the smallest dots to 14 ns for the largest ones.

AB - We report the absorption cross-section of colloidal InAs quantum dots of mean radii from 1.6 to 3.45 nm. We find excellent agreement between the measured results and calculated values based on a model of small-particle light absorption. The absorption cross-section per dot is 6.2 × 10 -16R 3 cm 2 at 2.76 eV and 3.15 × 10 -16R 1.28 cm 2 at the first-exciton absorption peak, with the dot radius R in nm. We find that the per-quantum-dot particle oscillator strength of the first-exciton transition is constant for all sizes studied. The radiative lifetime of the first exciton calculated from the oscillator strength increases with dot size and ranges from 4 ns for the smallest dots to 14 ns for the largest ones.

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U2 - 10.1021/jp046127i

DO - 10.1021/jp046127i

M3 - Article

AN - SCOPUS:18144363980

SN - 1520-6106

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SP - 7084

EP - 7087

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 15

ER -

Absorption Cross-Section and Related Optical Properties of Colloidal InAs Quantum Dots

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