l A recent measurement cjn an unhoped polycrystalline tetraczne fihn by A.W. Smith also yiekkd a flue of 0.2 f 0.1 nsec for the singlet lifetime.
Singlet exciton trapping and heterofission in tetracene doped anthracene crystals
β Scribed by M. Charbr; D.F. Williams
- Book ID
- 107731570
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 448 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0009-2614
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A picosecond laser system has been employed to study the kmetics of singlet evciton energy transfer m p-terphenyl single crystals doped with tetracene over the temperature range 77-300 K. First-order kinetics prevail and exciton migration from host to guest is controlled by thermal activation over a
## Abstract The fluorescence quenching under high excitation intensities has been studied in anthracene crystals. The singletβsinglet annihilation constant of (1 Β± 0.5) Γ 10^β8^ cm^3^ s^β1^ is calculated from the quenching of fluorescence induced by a nitrogen 16 ns pulse laser (Ξ» = 3371 Γ ). The ma
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