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

Martin Pope, Nicholas Geacintov, David Saperstein, Frank Vogel

Research output: Contribution to journalArticle

Abstract

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
Volume1-2
Issue numberC
DOIs
StatePublished - 1970

Fingerprint

diffusion length
diffusion coefficient
excitons
Crystalline materials
life (durability)
Quantum efficiency
luminous intensity
Genetic Recombination
fission
quantum efficiency
Fusion reactions
fusion
Fluorescence
Light
Wavelength
fluorescence
augmentation
curves
wavelengths
excitation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Calculation of the diffusion length, diffusion coefficient and lifetime of triplet excitons in crystalline tetracene. / Pope, Martin; Geacintov, Nicholas; Saperstein, David; Vogel, Frank.

In: Journal of Luminescence, Vol. 1-2, No. C, 1970, p. 224-230.

Research output: Contribution to journalArticle

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