Anomalies in the linear absorption, transient absorption, photoluminescence and photoluminescence excitation spectroscopies of colloidal InP quantum dots

Gary Rumbles, Donald C. Selmarten, Randy J. Ellingson, Jeffrey L. Blackburn, Pingrong Yu, Barton B. Smith, Olga I. Mićić, Arthur J. Nozik

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We report photoluminescence (PL), linear absorption and femtosecond, transient bleaching spectra for a colloidal solution of indium phosphide (InP) quantum dots (QDs) at ambient temperature. The PL quantum yield is shown to depend significantly upon the excitation wavelength and the PL excitation spectrum deviates markedly from the absorption spectrum. The cooling of electrons and holes to the lowest energy excited state is determined, by transient bleaching spectroscopy, to occur with an efficiency that is independent of the excitation wavelength. These results are discussed in terms of a threshold for a non-radiative decay process that resides above the bandgap and a PL quantum yield that depends upon the size of QD.

Original languageEnglish
Pages (from-to)187-195
Number of pages9
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume142
Issue number2-3
Publication statusPublished - Sep 14 2001

Fingerprint

Indium phosphide
indium phosphides
Semiconductor quantum dots
Photoluminescence
quantum dots
Spectroscopy
anomalies
photoluminescence
Quantum yield
bleaching
Bleaching
spectroscopy
excitation
Wavelength
Excited states
wavelengths
ambient temperature
Absorption spectra
Energy gap
Cooling

Keywords

  • InP quantum dots
  • Linear absorption
  • Photoluminescence
  • Transient absorption

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

Cite this

Anomalies in the linear absorption, transient absorption, photoluminescence and photoluminescence excitation spectroscopies of colloidal InP quantum dots. / Rumbles, Gary; Selmarten, Donald C.; Ellingson, Randy J.; Blackburn, Jeffrey L.; Yu, Pingrong; Smith, Barton B.; Mićić, Olga I.; Nozik, Arthur J.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 142, No. 2-3, 14.09.2001, p. 187-195.

Research output: Contribution to journalArticle

Rumbles, Gary ; Selmarten, Donald C. ; Ellingson, Randy J. ; Blackburn, Jeffrey L. ; Yu, Pingrong ; Smith, Barton B. ; Mićić, Olga I. ; Nozik, Arthur J. / Anomalies in the linear absorption, transient absorption, photoluminescence and photoluminescence excitation spectroscopies of colloidal InP quantum dots. In: Journal of Photochemistry and Photobiology A: Chemistry. 2001 ; Vol. 142, No. 2-3. pp. 187-195.
@article{ef59e7c7b98349d0ae1467871e934a35,
title = "Anomalies in the linear absorption, transient absorption, photoluminescence and photoluminescence excitation spectroscopies of colloidal InP quantum dots",
abstract = "We report photoluminescence (PL), linear absorption and femtosecond, transient bleaching spectra for a colloidal solution of indium phosphide (InP) quantum dots (QDs) at ambient temperature. The PL quantum yield is shown to depend significantly upon the excitation wavelength and the PL excitation spectrum deviates markedly from the absorption spectrum. The cooling of electrons and holes to the lowest energy excited state is determined, by transient bleaching spectroscopy, to occur with an efficiency that is independent of the excitation wavelength. These results are discussed in terms of a threshold for a non-radiative decay process that resides above the bandgap and a PL quantum yield that depends upon the size of QD.",
keywords = "InP quantum dots, Linear absorption, Photoluminescence, Transient absorption",
author = "Gary Rumbles and Selmarten, {Donald C.} and Ellingson, {Randy J.} and Blackburn, {Jeffrey L.} and Pingrong Yu and Smith, {Barton B.} and Mićić, {Olga I.} and Nozik, {Arthur J.}",
year = "2001",
month = "9",
day = "14",
language = "English",
volume = "142",
pages = "187--195",
journal = "Journal of Photochemistry and Photobiology A: Chemistry",
issn = "1010-6030",
publisher = "Elsevier",
number = "2-3",

}

TY - JOUR

T1 - Anomalies in the linear absorption, transient absorption, photoluminescence and photoluminescence excitation spectroscopies of colloidal InP quantum dots

AU - Rumbles, Gary

AU - Selmarten, Donald C.

AU - Ellingson, Randy J.

AU - Blackburn, Jeffrey L.

AU - Yu, Pingrong

AU - Smith, Barton B.

AU - Mićić, Olga I.

AU - Nozik, Arthur J.

PY - 2001/9/14

Y1 - 2001/9/14

N2 - We report photoluminescence (PL), linear absorption and femtosecond, transient bleaching spectra for a colloidal solution of indium phosphide (InP) quantum dots (QDs) at ambient temperature. The PL quantum yield is shown to depend significantly upon the excitation wavelength and the PL excitation spectrum deviates markedly from the absorption spectrum. The cooling of electrons and holes to the lowest energy excited state is determined, by transient bleaching spectroscopy, to occur with an efficiency that is independent of the excitation wavelength. These results are discussed in terms of a threshold for a non-radiative decay process that resides above the bandgap and a PL quantum yield that depends upon the size of QD.

AB - We report photoluminescence (PL), linear absorption and femtosecond, transient bleaching spectra for a colloidal solution of indium phosphide (InP) quantum dots (QDs) at ambient temperature. The PL quantum yield is shown to depend significantly upon the excitation wavelength and the PL excitation spectrum deviates markedly from the absorption spectrum. The cooling of electrons and holes to the lowest energy excited state is determined, by transient bleaching spectroscopy, to occur with an efficiency that is independent of the excitation wavelength. These results are discussed in terms of a threshold for a non-radiative decay process that resides above the bandgap and a PL quantum yield that depends upon the size of QD.

KW - InP quantum dots

KW - Linear absorption

KW - Photoluminescence

KW - Transient absorption

UR - http://www.scopus.com/inward/record.url?scp=0001233232&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001233232&partnerID=8YFLogxK

M3 - Article

VL - 142

SP - 187

EP - 195

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

SN - 1010-6030

IS - 2-3

ER -