Calculation of the diffusion length, diffusion coefficient and lifetime of triplet excitons in crystalline tetracene

Martin Pope, Nicholas E. Geacintov, David Saperstein, Frank Vogel

Research output: Contribution to journalArticle


The recombination, or fusion, of triplet excitons (which are efficiently produced by singlet exciton fission at 300 °K) leads to an enhancement in the fluorescence quantum efficiency Φ at excitation light intensities I ≳ 1015 quanta-cm-2-sec-1 (366 and 436 nm wavelength). It is possible to fit a calculated Φ (I) curve to the experimental data if values of the triplet exciton lifetime τ = 4.6 × 10-6 sec, diffusion coefficient perpendicular to ab plane D⊥ab = 2.0 × 10-4cm2-sec-1, and diffusion length l⊥ >ab = 4.2 × 10-5 cm are used.

Original languageEnglish (US)
Pages (from-to)224-230
Number of pages7
JournalJournal of Luminescence
Issue numberC
StatePublished - 1970


ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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