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Effects of traps on triplet-triplet annihilation in phenanthrene crystals

✍ Scribed by Nobuko I. Wakayama

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 324 KB
Volume: 59
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(78)89078-2

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✦ Synopsis

The temperature dependences of delayed and prompt fluorescence spectra for anthracene doped phenanthrene crystals (2 X lo* and less than lo6 M/M) have been studied :n the temperature range 77-293 K. The experimental results indicate that a shallow trap the depth of which is 250 cm-* competes with the deep anthracene trap in triplet excitation energy transfer from the host. The concentration of the shallow trap is estimated to be ca. 2.5 X 10" M/hi.

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