Cited by 481Graphene research and applicationsCarbon Nanotubes in CompositesCarbon and Quantum Dots Applications

Brightening of carbon nanotube photoluminescence through the incorporation of sp3 defects

Piao, Yanmei, Meany, Brendan, Powell, Lyndsey R., Valley, Nicholas, Kwon, Hyejin, Schatz, George C., Wang, YuHuang·2013·Nature Chemistry

Abstract

Semiconducting carbon nanotubes promise a broad range of potential applications in optoelectronics and imaging, but their photon-conversion efficiency is relatively low. Quantum theory suggests that nanotube photoluminescence is intrinsically inefficient because of low-lying 'dark' exciton states. Here we demonstrate the significant brightening of nanotube photoluminescence (up to 28-fold) through the creation of an optically allowed defect state that resides below the predicted energy level of the dark excitons. Emission from this new state generates a photoluminescence peak that is red-shifted by as much as 254 meV from the nanotube's original excitonic transition. We also found that the attachment of electron-withdrawing substituents to carbon nanotubes systematically drives this defect state further down the energy ladder. Our experiments show that the material's photoluminescence quantum yield increases exponentially as a function of the shifted emission energy. This work lays the foundation for chemical control of defect quantum states in low-dimensional carbon materials.

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Crossref · 10.1038/nchem.1711

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Authors
Piao, Y., Meany, B., Powell, L. R., Valley, N., Kwon, H., Schatz, G. C., & Wang, Y.
Affiliations
  • University of Maryland, College Park (US)
  • Northwestern University (US)
Corresponding author
Wang, YuHuang
Venue
Nature Chemistry
Published
2013-07-21
Volume
5
Issue
10
Pages
840-845
ISSN
  • 1755-4330 (ISSN-L)
  • 1755-4349
OpenAlex
W2007554685
Cited by
480
References
34
Citations by year
2026: 33 · 2025: 41 · 2024: 44 · 2023: 43 · 2022: 41 · 2021: 43 · 2020: 32 · 2019: 43 · 2018: 41 · 2017: 38 · 2016: 39 · 2015: 24 · 2014: 17 · 2013: 1
FWCI
12.18
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Chemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Multidisciplinary University Research Initiative
  • Army Research Office
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon and Quantum Dots Applications
Keywords
carbon nanotubes, sp3 defects, defect states, dark excitons, red-shifted emission, electron-withdrawing substituents, photoluminescence quantum yield, single-walled carbon nanotubes, chemical functionalization, photon conversion efficiency
MeSH terms
Electrons, Luminescent Measurements, Particle Size, Quantum Theory, Nanotubes, Carbon

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