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Location of the lowest exciton in C60 single crystal by two-photon excitation spectroscopy

✍ Scribed by M. Muccini; R. Danieli; R. Zamboni; C. Taliani; H. Mohn; W. Müller; H.U. ter Meer

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 371 KB
Volume: 245
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00973-8

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✦ Synopsis

Two-photon excitation of C6o single crystal at 4 K shows a sharp band at 1.846 eV which is assigned to the lowest tbrbidden Frenkel singlet exciton of Tlg symmetry. This assignment is supported by the analysis of Herzberg-Teller induced photoluminescence.

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Location of the lowest even parity excit

Location of the lowest even parity excited singlet state in poly(p-phenylenevinylene) by two-photon fluorescence spectroscopy

✍ C.J. Baker; O.M. Gelsen; D.D.C. Bradley 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 407 KB

We report the two-photon fluorescence excitation spectrum of poly(pphenylenevinylene) over the energy range 1.1-2.0 eV. The onset for two-photon fluorescence excitation is at 1.3 eV with a strong peak near I.475 eV. The peak locates the energy of the lowest even parity excited singlet at 2.95 eV, so