Organic Molecular Tuning of Many-Body Interaction Energies in Air-Suspended Carbon Nanotubes

We investigate adsorption effects of copper phthalocyanine molecules on excitons and trions in air-suspended carbon nanotubes. Using photoluminescence excitation spectroscopy, we observe that exciton energy red-shifts gradually with the molecular deposition thickness. The trion emission is also obse...

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Published inJournal of physical chemistry. C Vol. 123; no. 9; pp. 5776 - 5781
Main Authors Tanaka, Shunsuke, Otsuka, Keigo, Kimura, Kensuke, Ishii, Akihiro, Imada, Hiroshi, Kim, Yousoo, Kato, Yuichiro K
Format Journal Article
LanguageEnglish
Published American Chemical Society 07.03.2019
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Summary:We investigate adsorption effects of copper phthalocyanine molecules on excitons and trions in air-suspended carbon nanotubes. Using photoluminescence excitation spectroscopy, we observe that exciton energy red-shifts gradually with the molecular deposition thickness. The trion emission is also observed at large deposition amounts, which indicates charge transfer between the phthalocyanine molecules and carbon nanotubes. Analysis of the spectra for individual tubes reveals a correlation between the exciton–trion energy separation and the exciton emission energy, showing that the many-body interaction energies scale similarly with the molecular dielectric screening.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.8b12496