Professor Chris Groves chris.groves@durham.ac.uk
Professor
Suppression of geminate charge recombination in organic photovoltaic devices with a cascaded energy heterojunction
Groves, C.
Authors
Abstract
The effect of cascaded energy heterojunctions on geminate charge recombination in organic photovoltaic devices is examined using a kinetic Monte Carlo model. The structure of the cascaded heterojunction, which encourages spatial separation of the geminate charge pair, is varied to recreate that found in ternary blends and tri-layers, as well as that formed by self-organization in binary blends in which one component crystallizes. It is shown that substantial reductions in charge recombination can indeed be achieved with parameters similar that reported for P3HT:PCBM solar cells. However, the efficacy of cascaded energy heterojunctions is shown to be limited for thick cascade layers (>10 nm). This provides guidance as how to design ternary organic photovoltaics, whilst also offering a possible explanation of low recombination efficiency in some semi-crystalline OPVs.
Citation
Groves, C. (2013). Suppression of geminate charge recombination in organic photovoltaic devices with a cascaded energy heterojunction. Energy & Environmental Science, 6(5), 1546-1551. https://doi.org/10.1039/c3ee24455e
Journal Article Type | Article |
---|---|
Publication Date | May 1, 2013 |
Deposit Date | May 14, 2013 |
Publicly Available Date | Mar 29, 2024 |
Journal | Energy & Environmental Science |
Print ISSN | 1754-5692 |
Electronic ISSN | 1754-5706 |
Publisher | Royal Society of Chemistry |
Peer Reviewed | Peer Reviewed |
Volume | 6 |
Issue | 5 |
Pages | 1546-1551 |
DOI | https://doi.org/10.1039/c3ee24455e |
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