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Energies 2017, 10(10), 1490; doi:10.3390/en10101490

Probing Temperature-Dependent Recombination Kinetics in Polymer:Fullerene Solar Cells by Electric Noise Spectroscopy

1
Dipartimento di Ingegneria Industriale, Università di Salerno, I-84084 Fisciano, Salerno, Italy
2
Dipartimento di Fisica “E.R. Caianiello” and CNR-SPIN Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
3
Institute of Physics, Carl von Ossietzky University of Oldenburg, 26111 Oldenburg, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Peter J. S. Foot
Received: 6 September 2017 / Revised: 6 September 2017 / Accepted: 21 September 2017 / Published: 26 September 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
View Full-Text   |   Download PDF [2298 KB, uploaded 27 September 2017]   |  

Abstract

The influence of solvent additives on the temperature behavior of both charge carrier transport and recombination kinetics in bulk heterojunction solar cells has been investigated by electric noise spectroscopy. The observed differences in charge carrier lifetime and mobility are attributed to a different film ordering and donor-acceptor phase segregation in the blend. The measured temperature dependence indicates that bimolecular recombination is the dominant loss mechanism in the active layer, affecting the device performance. Blend devices prepared with a high-boiling-point solvent additive show a decreased recombination rate at the donor-acceptor interface as compared to the ones prepared with the reference solvent. A clear correlation between the device performance and the morphological properties is discussed in terms of the temperature dependence of the mobility-lifetime product. View Full-Text
Keywords: organic photovoltaics; electric noise processes; Langevin-type recombination organic photovoltaics; electric noise processes; Langevin-type recombination
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Landi, G.; Barone, C.; Mauro, C.; De Sio, A.; Carapella, G.; Neitzert, H.C.; Pagano, S. Probing Temperature-Dependent Recombination Kinetics in Polymer:Fullerene Solar Cells by Electric Noise Spectroscopy. Energies 2017, 10, 1490.

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