Frequency-dependent response in ITO/Alq3/Al organic light-emitting diodes

Frequency-dependent response of organic light-emitting diodes was studied in a device structure of ITO/Alq3 (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 o...

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Bibliographic Details
Published in:Current applied physics 2004, 4(5), , pp.543-546
Main Authors: Tae Wan Kim, Sung-Woo Hur, Joon-Ung Lee, Min-Jong Song, Kyung-Uk Jang, Sang-Keol Kim, Hyun-Nam Cho, Dong-Hoe Chung
Format: Article
Language:Korean
Subjects:
물리학
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Summary:Frequency-dependent response of organic light-emitting diodes was studied in a device structure of ITO/Alq3 (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 resistanceRp and capacitance Cp. From thefrequency-dependent response, we are able to obtain characteristic crossover frequencyx 0 separating resistive and capacitive re-sponse. And we found that there is an eect of interfacial polarization in the frequency range well below the crossover frequency when the applied voltage is lower than turn-on voltage. KCI Citation Count: 4
ISSN:1567-1739
1878-1675