Shukla, Manju and Kumar, Pankaj and Chand, Suresh and Brahme, Nameeta and Kher, R. S. and Khokhar, M. S. K. (2008) Kinetics of transient electroluminescence in organic light emitting diodes. Journal of Physics D: Applied Physics, 41 (16). pp. 1-5. ISSN 1361-6463

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Mathematical simulation on the rise and decay kinetics of transient electroluminescence (EL) in organic light emitting diodes (OLEDs) is presented. The transient EL is studied with respect to a step voltage pulse. While rising, for lower values of time, the EL intensity shows a quadratic dependence on (t ? tdel), where tdel is the time delay observed in the onset of EL, and finally attains saturation at a sufficiently large time. When the applied voltage is switched off, the initial EL decay shows an exponential dependence on (t ? tdec), where tdec is the time when the voltage is switched off. The simulated results are compared with the transient EL performance of a bilayer OLED based on small molecular bis(2-methyl 8-hydroxyquinoline)(triphenyl siloxy) aluminium (SAlq). Transient EL studies have been carried out at different voltage pulse amplitudes. The simulated results show good agreement with experimental data. Using these simulated results the lifetime of the excitons in SAlq has also been calculated.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s IOP PUBLISHING.
Subjects: Physics
Depositing User: Ms Neetu Chandra
Date Deposited: 15 Apr 2015 07:51
Last Modified: 15 Apr 2015 07:51

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