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Prediction of an order of magnitude for electron and hole mobilities using 1D simulations

Published online by Cambridge University Press:  04 June 2013

Damir Aidarkhanov
Affiliation:
Renewable Energy Department, Nazarbayev University Research and Innovation System, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Republic of Kazakhstan. Institut d'Électronique du Solide et des Systèmes, Strasbourg University, Télécom Physique Strasbourg, Illkirch, France.
Adam Raba
Affiliation:
Institut d'Électronique du Solide et des Systèmes, Strasbourg University, Télécom Physique Strasbourg, Illkirch, France.
Yann Leroy
Affiliation:
Institut d'Électronique du Solide et des Systèmes, Strasbourg University, Télécom Physique Strasbourg, Illkirch, France.
Anne-Sophie Cordan
Affiliation:
Institut d'Électronique du Solide et des Systèmes, Strasbourg University, Télécom Physique Strasbourg, Illkirch, France.
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Abstract

Organic photovoltaics has attracted much effort and many research groups during the past decade, because of low-cost and easy fabrication techniques. Despite the great progress that has been achieved in increasing the conversion efficiencies of the devices, there are still several problems to be solved to make the solar cells commercially viable, especially for cells based on bulk heterojunctions.

The purpose of this work is to supply techniques for predicting the order of magnitude of the charge carrier mobilities of bulk heterojunction devices, on the basis of easy-to-perform measurements for experimentalists. A one dimensional model of a bulk heterojunction cell was used, and then simulations were performed in order to obtain the photocurrent as a function of an effective applied voltage. Plotted in a double logarithmic scale, the resulting curves exhibit different signatures depending on the mobilities of the charge carriers. These signatures could be helpful for experimentalists in order to predict an order of magnitude for both the electron mobility and the hole mobility.

Type
Articles
Copyright
Copyright © Materials Research Society 2013 

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References

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