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An analytical model for organic solar cells incorporating non-geminate monomolecular and bimolecular recombinations

Inche Ibrahim, Mohd Lukman (2018) An analytical model for organic solar cells incorporating non-geminate monomolecular and bimolecular recombinations. Semiconductor Science and Technology, 33 (12). ISSN 1361-6641

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Abstract

There is still a debate concerning the non-geminate recombination processes in organic bulk heterojunction solar cells. There are reports that suggest either only the non-geminate bimolecular recombination or the non-geminate monomolecular recombination is important, and also reports that suggest both non-geminate processes are important. In this paper, a physics-based analytical model for describing the current–voltage characteristics of organic bulk heterojunction solar cells is presented. The model incorporates both non-geminate recombination processes, which is an improvement compared with previous analytical models. This makes the model versatile by allowing us to choose whether to include both recombination processes or exclude one of the processes, depending on the studied device. In developing the model, a new method for calculating the non-geminate recombination and the current density in organic bulk heterojunction solar cells is proposed and employed. The model is validated with experimental current–voltage characteristics taken from the literature. Using the model, we show that considering the nongeminate recombination is important in order to properly predict the current–voltage characteristics of organic bulk heterojunction solar cells. The model can be useful for understanding the working operation of organic bulk heterojunction solar cells, and thus for predicting and improving the device performance. Finally, the method employed to develop the presented model can also be extended and employed to develop models for other devices.

Item Type: Article (Journal)
Additional Information: 7410/67800
Uncontrolled Keywords: organic solar cell, analytical model, non-geminate recombination, current–voltage characteristic
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Science
Depositing User: Dr Mohd Lukman Inche Ibrahim
Date Deposited: 29 Nov 2018 15:09
Last Modified: 27 Jan 2019 16:40
URI: http://irep.iium.edu.my/id/eprint/67800

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