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Singlet Fission from Upper Excited Electronic States of Cofacial Perylene Dimer
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2019 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 10, no 10, p. 2428-2433Article in journal (Refereed) Published
Abstract [en]

Singlet fission directly from the upper excited vibrational and electronic states of cofacial perylene dimers, bypassing the relaxed state S-1, was detected within 50 fs. This process competes well with vibrational cooling in S-1 (4.7-7.0 ps) and S-2 -> S-1 internal conversion (380 fs). The singlet fission has the energy threshold E = 3.06 eV. Other competitive relaxation processes are excimer and dimer cation formation on an ultrafast time scale. Excitation to higher energy levels (4.96 eV) leads to a higher efficiency of singlet fission.

Place, publisher, year, edition, pages
2019. Vol. 10, no 10, p. 2428-2433
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-252975DOI: 10.1021/acs.jpclett.9b00717ISI: 000468379300019PubMedID: 31025867Scopus ID: 2-s2.0-85065845106OAI: oai:DiVA.org:kth-252975DiVA, id: diva2:1342734
Note

QC 20190814

Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2022-06-26Bibliographically approved

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Sun, Licheng

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Zhao, JianzhangChe, YuanyuanSun, Licheng
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Centre of Molecular Devices, CMDOrganic chemistry
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