Photo-ionization of two-photon-excited singlet excitons in anthracene

E. Courtens, A. Bergman, J. Jortner

Research output: Contribution to journalArticlepeer-review

Abstract

The results of an experimental study of the photoconductivity induced by a giant-pulse ruby laser in crystalline anthracene lead to the following conclusions: (1) Up to laser intensities of 5×1025 photons cm-2 sec-1, charge carriers are generated by a three-photon process. (2) The dominant mechanism for the production of charge carriers involves the photo-ionization of singlet-exciton states. (3) A cross section of 10-19 cm2 at λ=6940 was determined for the photo-ionization of singlet-exciton states. (4) A bimolecular rate constant of (5±3)×10-7 cm3 sec-1 for charge-carrier recombination in crystalline anthracene was directly determined.

Original languageEnglish
Pages (from-to)948-950
Number of pages3
JournalPhysical Review
Volume156
Issue number3
DOIs
StatePublished - 1967

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