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- W3048893373 abstract "Photophysics of single-wall carbon nanotubes (SWCNTs) is intensively studied due to their potential application in light harvesting and optoelectronics. Excited states of SWCNTs form strongly bound electron-hole pairs, excitons, of which only singlet excitons participate in application relevant optical transitions. Long-living spin-triplet states hinder applications but they emerge as candidates for quantum information storage. Therefore knowledge of the triplet exciton energy structure, in particular in a SWCNT chirality dependent manner, is greatly desired. We report the observation of light emission from triplet state recombination, i.e. phosphorescence, for several SWCNT chiralities using a purpose-built spectrometer. This yields the singlet-triplet gap as a function of SWCNT diameter and it follows predictions based on quantum confinement effects. Saturation under high microwave power (up to 10 W) irradiation allows to determine the spin-relaxation time for triplet states. Our study sensitively discriminates whether the lowest optically active state is populated from an excited state on the same nanotube or through Forster exciton energy transfer from a neighboring nanotube." @default.
- W3048893373 created "2020-08-18" @default.
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- W3048893373 date "2020-08-13" @default.
- W3048893373 modified "2023-09-30" @default.
- W3048893373 title "Incidence of Quantum Confinement on Dark Triplet Excitons in Carbon Nanotubes" @default.
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- W3048893373 doi "https://doi.org/10.1021/acsnano.0c03139" @default.
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