Publication: Hopping and drift-diffusion currents in organic devices
Issued Date
2007-08-28
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2-s2.0-34548132766
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Mahidol University
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SCOPUS
Bibliographic Citation
Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007. (2007), 830-833
Suggested Citation
Kanchana Sivalertporn, Tanakorn Osotchan Hopping and drift-diffusion currents in organic devices. Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007. (2007), 830-833. doi:10.1109/NEMS.2007.352146 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/24395
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Title
Hopping and drift-diffusion currents in organic devices
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Abstract
In physical model, the carrier transport in organic devices can be described by hopping mechanism however a number of reports were successfully applied the drift-diffusion model used normally in continuous media to numerically simulate the carrier transport in discrete organic material. In this paper the carrier transport derived from hopping and drift-diffusion models were investigated in the organic device composed of ITO/MEH-PPV/Al. The calculated current densities from both models exhibit the same feature since the boundary current at the contact were evaluated with the same current components. However the slightly differences were found in the internal electric field and carrier density. This is probably due to the slightly modification of the carrier rate equation in the nearest neighbor hopping approximation and Sharfetter-Gummel spatial discretization. © 2007 IEEE.