Transient response of blue organic electroluminescence devices with short fluorescence, lifetime of substituted phenyl/vinyl compound as an emissive layer
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We have demonstrated a short fluorescence lifetime of the substituted phenyl/vinyl compound, 1,4-bis[2-[4-[N N-di(p-tolyl)amino]phertyl]vinyl]benzene (DSB). The fluorescence lifetime of the 0.5 mol.% DSB-doped 4,4'-bis(9-carbazolyl)biphenyl film is 1.2 ns, which is desirable for organic light-emitting diode (OLED) light sources for optical interconnect applications. We have also examined frequency dependences on the electroluminescence (EL) intensity of the OLED and the photoluminescence (PL) intensity of the DSB film. The -3 dB cutoff frequency of the EL intensity is about 3 MHz for the optimized device, and the -3 dB cutoff frequency of the PL intensity is about 160 MHz for the optically pumping DSB film. (c) 2007 Optical Society of America.
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