Journal article
Photocarrier drift distance in organic solar cells and photodetectors
Scientific Reports, Vol.5, Article 9949
2015
Abstract
Light harvesting systems based upon disordered materials are not only widespread in nature, but are also increasingly prevalent in solar cells and photodetectors. Examples include organic semiconductors, which typically possess low charge carrier mobilities and Langevin-type recombination dynamics - both of which negatively impact the device performance. It is accepted wisdom that the "drift distance'' (i.e., the distance a photocarrier drifts before recombination) is defined by the mobility-lifetime product in solar cells. We demonstrate that this traditional figure of merit is inadequate for describing the charge transport physics of organic light harvesting systems. It is experimentally shown that the onset of the photocarrier recombination is determined by the electrode charge and we propose the mobility-recombination coefficient product as an alternative figure of merit. The implications of these findings are relevant to a wide range of light harvesting systems and will necessitate a rethink of the critical parameters of charge transport.
Details
- Title
- Photocarrier drift distance in organic solar cells and photodetectors
- Authors/Creators
- M. Stolterfoht (Author/Creator) - The University of QueenslandA. Armin (Author/Creator) - The University of QueenslandB. Philippa (Author/Creator) - James Cook UniversityR.D. White (Author/Creator) - James Cook UniversityP.L. Burn (Author/Creator) - The University of QueenslandP. Meredith (Author/Creator) - The University of QueenslandG. Juška (Author/Creator) - Vilnius UniversityA. Pivrikas (Author/Creator) - The University of Queensland
- Publication Details
- Scientific Reports, Vol.5, Article 9949
- Identifiers
- 991005542107707891
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.114 Organic Semiconductors
- 2.114.61 Organic Solar Cells
- Web Of Science research areas
- Physics, Applied
- ESI research areas
- Materials Science