Journal article
Reduced Recombination in High Efficiency Molecular Nematic Liquid Crystalline: Fullerene Solar Cells
A Armin, J Subbiah, M Stolterfoht, S Shoaee, Z Xiao, S Lu, DJ Jones, P Meredith
Advanced Energy Materials | WILEY-V C H VERLAG GMBH | Published : 2016
Abstract
Bimolecular recombination in bulk heterojunction organic solar cells is the process by which nongeminate photogenerated free carriers encounter each other, and combine to form a charge transfer (CT) state which subsequently relaxes to the ground state. It is governed by the diffusion of the slower and faster carriers toward the electron donor–acceptor interface. In an increasing number of systems, the recombination rate constant is measured to be lower than that predicted by Langevin's model for relative Brownian motion and the capture of opposite charges. This study investigates the dynamics of charge generation, transport, and recombination in a nematic liquid crystalline donor:fullerene a..
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Funding Acknowledgements
This program was funded by the Australian Government through the Australian Renewable Energy Agency (ARENA) Australian Centre for Advanced Photovoltaics (ACAP). Responsibility for the views, information, or advice expressed herein is not accepted by the Australian Government. This work was performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF)-a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australia's researchers. The Centre for Organic Photonics and Electronics is a strategic initiative of the University of Queensland.