Photoluminescence quantum yields and nonradiative decay of the excitonic
S-1, state in length fractionated (6,5) single-wall carbon nanotubes
(SWNTs) are studied by continuous wave and time-resolved fluorescence
spectroscopy. The experimental data are modeled by diffusion limited
contact quenching of excitons at stationary quenching sites including
tube ends. A combined analysis of the time-resolved photoluminescence
decay and the length dependence of photoluminescence quantum yields (PL
QYs) from SWNTs in sodium cholate suspensions allows to determine the
exciton diffusion coefficient D = 10.7 +/- 0.4 cm(2)s(-1) and lifetime
T-pL for long tubes of 20 +/- 1 ps. PL quantum yields Phi(pL) are found
to scale with the inverse diffusion coefficient and the square of the
mean quenching site distance, here I-d = 120 +/- 25 nm. The results
suggest that low PL QYs of SWNTs are due to the combination of
high-diffusive exciton mobility with the presence of only a few
quenching sites.
%0 Journal Article
%1 hertel2010diffusion
%A Hertel, Tobias
%A Himmelein, Sabine
%A Ackermann, Thomas
%A Stich, Dominik
%A Crochet, Jared
%D 2010
%J ACS NANO
%K imported myown
%N 12
%P 7161-7168
%R 10.1021/nn101612b
%T Diffusion Limited Photoluminescence Quantum Yields in 1-D
Semiconductors: Single-Wall Carbon Nanotubes
%V 4
%X Photoluminescence quantum yields and nonradiative decay of the excitonic
S-1, state in length fractionated (6,5) single-wall carbon nanotubes
(SWNTs) are studied by continuous wave and time-resolved fluorescence
spectroscopy. The experimental data are modeled by diffusion limited
contact quenching of excitons at stationary quenching sites including
tube ends. A combined analysis of the time-resolved photoluminescence
decay and the length dependence of photoluminescence quantum yields (PL
QYs) from SWNTs in sodium cholate suspensions allows to determine the
exciton diffusion coefficient D = 10.7 +/- 0.4 cm(2)s(-1) and lifetime
T-pL for long tubes of 20 +/- 1 ps. PL quantum yields Phi(pL) are found
to scale with the inverse diffusion coefficient and the square of the
mean quenching site distance, here I-d = 120 +/- 25 nm. The results
suggest that low PL QYs of SWNTs are due to the combination of
high-diffusive exciton mobility with the presence of only a few
quenching sites.
@article{hertel2010diffusion,
abstract = {{Photoluminescence quantum yields and nonradiative decay of the excitonic
S-1, state in length fractionated (6,5) single-wall carbon nanotubes
(SWNTs) are studied by continuous wave and time-resolved fluorescence
spectroscopy. The experimental data are modeled by diffusion limited
contact quenching of excitons at stationary quenching sites including
tube ends. A combined analysis of the time-resolved photoluminescence
decay and the length dependence of photoluminescence quantum yields (PL
QYs) from SWNTs in sodium cholate suspensions allows to determine the
exciton diffusion coefficient D = 10.7 +/- 0.4 cm(2)s(-1) and lifetime
T-pL for long tubes of 20 +/- 1 ps. PL quantum yields Phi(pL) are found
to scale with the inverse diffusion coefficient and the square of the
mean quenching site distance, here I-d = 120 +/- 25 nm. The results
suggest that low PL QYs of SWNTs are due to the combination of
high-diffusive exciton mobility with the presence of only a few
quenching sites.}},
added-at = {2021-01-26T13:59:32.000+0100},
author = {Hertel, Tobias and Himmelein, Sabine and Ackermann, Thomas and Stich, Dominik and Crochet, Jared},
biburl = {https://www.bibsonomy.org/bibtex/27bf8039338d4a7061d85c054dccc7332/hertel-group},
doi = {{10.1021/nn101612b}},
interhash = {1fa6af30a4b8d58d10e451fd346b8720},
intrahash = {7bf8039338d4a7061d85c054dccc7332},
issn = {{1936-0851}},
journal = {{ACS NANO}},
keywords = {imported myown},
month = {{DEC}},
number = {{12}},
orcid-numbers = {{Stich, Dominik/0000-0002-7166-8759
Crochet, Jared/0000-0002-9570-2173}},
pages = {{7161-7168}},
researcherid-numbers = {{Crochet, Jared/C-8488-2011
Hertel, Tobias/J-4243-2012
Hertel, Tobias/D-5805-2013
}},
timestamp = {2021-01-26T13:59:47.000+0100},
title = {{Diffusion Limited Photoluminescence Quantum Yields in 1-D
Semiconductors: Single-Wall Carbon Nanotubes}},
unique-id = {{ISI:000285449100016}},
volume = {{4}},
year = {{2010}}
}