The intensity of the delayed fluorescence (DF) - ODMR spectra of the t-stilbene (TSB) - 1,2,4,5-tetracyanobenzene 1:2 crystal has been studied as a function of frequency nu_M of the amplitude modulation acting on the resonant microwave field over a wide range of nu_M values (1 KHz - 1 MHz). At high values of nu_M (> 100 KHz) the change in the DF yield is due to the microwave transitions induced between annihilating triplet pair substates. Under such conditions the ODMR linewidth gives a measure of the triplet-triplet pair lifetime.
Delayed Fluorescence - ODMR spectra of the t-stilbene-(TCNB)2 crystal
AGOSTINI, GIANCARLO;GIACOMETTI, GIOVANNI;PASIMENI, LUIGI;TOFFOLETTI, ANTONIO
1989
Abstract
The intensity of the delayed fluorescence (DF) - ODMR spectra of the t-stilbene (TSB) - 1,2,4,5-tetracyanobenzene 1:2 crystal has been studied as a function of frequency nu_M of the amplitude modulation acting on the resonant microwave field over a wide range of nu_M values (1 KHz - 1 MHz). At high values of nu_M (> 100 KHz) the change in the DF yield is due to the microwave transitions induced between annihilating triplet pair substates. Under such conditions the ODMR linewidth gives a measure of the triplet-triplet pair lifetime.
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