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Frequency-dependent response of organic light-emitting diodes was studied in a device structure of ITO/Alq 3 (60 nm)/Al. Frequency was varied from 40 Hz to 1 MHz and the bias voltage was varied from -5 to +13 V. We have interpreted the frequency-dependent response in terms of equivalent circuit model of parallel combination of resistance R p and capacitance C p . From the frequency-dependent...
We present the organic electroluminescent devices and lasers of which the colors are tuned by utilizing the Forster excitation energy transfer. Fluorene-based light emitting polymers, poly(2,7-bis(p-stiryl)-9,9 ' -di-n-hexylfluorene sebacate) (PBSDHFS), poly(9,9 ' -di-n-hexyl fluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran...
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