Transient optical emission spectra of biphenyl-1,2,4,5-tetracyanobenzene crystal doped with TCNQ have been investigated in the (77-300)K temperature range. Host prompt fluorescence lifetimes have been measured by cross-correlation phase fluorometry. The decay signal is fitted by a biexponential function whose coefficients are strongly dependent on temperature. A thermal activation energy of 300 cm-1 for the diffusion of singlet exciton has been determined.
FLUORESCENCE LIFETIMES IN THE BIPHENYL-TETRACYANOBENZENE CRYSTAL DOPED WITH TCNQ
AGOSTINI, GIANCARLO;GIACOMETTI, GIOVANNI;TOFFOLETTI, ANTONIO;PASIMENI, LUIGI
1990
Abstract
Transient optical emission spectra of biphenyl-1,2,4,5-tetracyanobenzene crystal doped with TCNQ have been investigated in the (77-300)K temperature range. Host prompt fluorescence lifetimes have been measured by cross-correlation phase fluorometry. The decay signal is fitted by a biexponential function whose coefficients are strongly dependent on temperature. A thermal activation energy of 300 cm-1 for the diffusion of singlet exciton has been determined.
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