Hertel, Tobias, Himmelein, Sabine, Ackermann, Thomas, Stich, Dominik ORCID: 0000-0002-7166-8759 and Crochet, Jared ORCID: 0000-0002-9570-2173 (2010). Diffusion Limited Photoluminescence Quantum Yields in 1-D Semiconductors: Single-Wall Carbon Nanotubes. ACS Nano, 4 (12). S. 7161 - 7169. WASHINGTON: AMER CHEMICAL SOC. ISSN 1936-0851

Full text not available from this repository.

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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Hertel, TobiasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Himmelein, SabineUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ackermann, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stich, DominikUNSPECIFIEDorcid.org/0000-0002-7166-8759UNSPECIFIED
Crochet, JaredUNSPECIFIEDorcid.org/0000-0002-9570-2173UNSPECIFIED
URN: urn:nbn:de:hbz:38-491010
DOI: 10.1021/nn101612b
Journal or Publication Title: ACS Nano
Volume: 4
Number: 12
Page Range: S. 7161 - 7169
Date: 2010
Publisher: AMER CHEMICAL SOC
Place of Publication: WASHINGTON
ISSN: 1936-0851
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
FLUORESCENCE CORRELATION SPECTROSCOPY; EXCITON DIFFUSION; DESORPTION; EFFICIENCY; GRAPHITE; SOLVENTS; KINETICS; BUNDLES; OXYGENMultiple languages
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49101

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item