Author:
Fleming GR,Millar DP,Morris GC,Morris JM,Robinson GW
Abstract
The time-resolved
fluorescence of tetracene crystals excited by a single 7-ps pulse of 530-nm
light has been measured with a streak camera/OMA system. The singlet exciton
lifetime was found to be 300�30 ps at 293 K.
Singlet-singlet exciton annihilation was observed, and the rate constant found
to be 5 x 10-9 cm3 s-1. In order to fit the
observed decay curves, an upper limit of c. 1 x 10-9 cm3
s-1 must be set on the singlet-triplet exciton annihilation rate.
The measured singlet-singlet exciton annihilation rate is consistent with a
hopping model for singlet exciton motion at room temperature.
Cited by
31 articles.
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