Coexistence of Exciton Fission and Fusion in Tetracene Crystals
1970; American Physical Society; Volume: 1; Issue: 2 Linguagem: Inglês
10.1103/physrevb.1.815
ISSN0556-2805
AutoresR. P. Groff, P. Avakian, R. E. Merrifield,
Tópico(s)Molecular Junctions and Nanostructures
ResumoTriplet exciton fusion and singlet excition fission have been observed in tetracene crystals, and the magnetic field dependence and the rate constants for these processes have been measured. At 0\ifmmode^\circ\else\textdegree\fi{}C the singlet fission rate constant and the triplet-triplet fusion rate constant (leading to excited singlets) are (6.3\ifmmode\pm\else\textpm\fi{}0.7) \ifmmode\times\else\texttimes\fi{}${10}^{8}$ ${\mathrm{sec}}^{\ensuremath{-}1}$ and 9\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}10}$ ${\mathrm{cm}}^{3}$ sec-1 (within an order of magnitude), respectively.
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