W. Graupner et al., Electric field-assisted femtosecond pump-probe spectroscopy in organic light emitting diodes, SYNTH METAL, 101(1-3), 1999, pp. 277-280
The electric-field assisted pump-probe technique is applied to organic ligh
t emitting diodes. Results demonstrate the potential of this new experiment
al approach, which combines the selectivity of a modulation technique to th
e time resolution of optical correlated detection. It is shown that the dyn
amics allows separating Stark-effects, which are instantaneous, and populat
ion changes, which can be time resolved.