Journal ArticleDOI
Diffusion limited photoluminescence quantum yields in 1-D semiconductors: single-wall carbon nanotubes.
TLDR
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.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 τ(PL) for long tubes of 20 ± 1 ps. PL quantum yields Φ(PL) are found to scale with the inverse diffusion coefficient and the square of the mean quenching site distance, here l(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.read more
Citations
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Journal ArticleDOI
Carbon nanotubes as emerging quantum-light sources
Xiaowei He,Han Htoon,Stephen K. Doorn,Wolfram H. P. Pernice,Feliks Pyatkov,Feliks Pyatkov,Ralph Krupke,Ralph Krupke,Adrien Jeantet,Yannick Chassagneux,Christophe Voisin +10 more
TL;DR: This Perspective describes the recent advances in understanding and controlling the properties of single-wall carbon nanotubes as well as the progress towards the fabrication of new electrically driven single-photon sources.
Journal ArticleDOI
Brightening of excitons in carbon nanotubes on dimensionality modification
Yuhei Miyauchi,Yuhei Miyauchi,Munechiyo Iwamura,Shinichiro Mouri,Tadashi Kawazoe,Motoichi Ohtsu,Kazunari Matsuda +6 more
TL;DR: In this article, the effective dimensionality of carbon nanotubes from one to zero dimensions was reduced, and the luminescence quantum yield of excitons confined in zero-dimensional-like states was increased to ∼18%.
Journal ArticleDOI
Photoluminescent Carbon Nanostructures
TL;DR: In this paper, a critical review of photoluminescence properties, their control, and origin in various carbon allotropes and their composites is presented, involving excitonic PL in carbon nanotubes, thermally activated delayed fluorescence in spherical fullerenes, the presence of impurity-vacancy color centers in nanodiamonds, aromatic sp2 domains in reduced graphene oxide, and surface chromophores or defect-related PL in Carbon dots.
Journal ArticleDOI
Large scale, selective dispersion of long single-walled carbon nanotubes with high photoluminescence quantum yield by shear force mixing
Arko Graf,Yuriy Zakharko,Stefan P. Schießl,Claudia Backes,Moritz Pfohl,Moritz Pfohl,Benjamin S. Flavel,Jana Zaumseil +7 more
TL;DR: In this article, the authors used simple high speed shear force mixing (SFM) to disperse nearly monochiral (6,5) SWCNTs with poly[(9,9-dioctylfluorenyl-2,7-diyl)- alt - co-co-(6,6′-{2,2′-bipyridine})] (PFO-BPy) with high yield and in large volumes.
Journal ArticleDOI
Molar Extinction Coefficient of Single-Wall Carbon Nanotubes
Friedrich Schöppler,Christoph Mann,Tilman C. Hain,Felix M. Neubauer,G. Privitera,Francesco Bonaccorso,Daping Chu,Andrea C. Ferrari,Tobias Hertel +8 more
TL;DR: In this paper, the molar extinction coefficient of single-wall carbon nanotubes (SWNTs) is determined using fluorescence tagging, as well as atomic force microscopy (AFM) imaging, which facilitate the correlation of nanotube concentrations with absorption spectra.
References
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