Non-Langevin bimolecular recombination in a silole-based polymer:PCBM solar cell measured by time-resolved charge extraction and resistance-dependent time-of-flight techniques

Authors

Tracey M. Clark, University of Wollongong
Jeff Peet, Konarka Technologies, USA
Patrick Denk, Konarka Austria
Gilles Dennler, Konarka Technologies, USA
Christopher Lungenschmied, Konarka Technologies, USA
Attila J. Mozer, University of WollongongFollow

RIS ID

47032

Publication Details

Clarke, T. M., Peet, J., Denk, P., Dennler, G., Lungenschmied, C. & Mozer, A. J. (2012). Non-Langevin bimolecular recombination in a silole-based polymer:PCBM solar cell measured by time-resolved charge extraction and resistance-dependent time-of-flight techniques. Energy and Environmental Science, 5 (1), 5241-5245.

Abstract

The silole-based non-Langevin conjugated polymer KP115 has been used to demonstrate that circuit resistance is a crucial parameter in time-of-flight measurements of organic photovoltaic cells, providing a resistance-dependent bimolecular recombination coefficient. The origin of this behaviour is the biphasic decay dynamics present in KP115:PCBM devices (observed using a novel time-dependent charge extraction technique), which time-of-flight cannot accurately characterise.