Modeling the Free Carrier Recombination Kinetics in PTB7 [electronic resource] : PCBM Organic Photovoltaics
- Published
- Washington, D.C. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy - Physical Description
- pages 24,597-24,604 : digital, PDF file
- Additional Creators
- National Renewable Energy Laboratory (U.S.), United States. Department of Energy. Office of Energy Efficiency and Renewable Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- Currently the exact recombination mechanism of free carriers in organic photovoltaic (OPV) devices is poorly understood. Often a reduced Langevin model is used to describe the decay behavior of electrons and holes. Here we propose a novel, simple kinetic model that accurately describes the decay behavior of free carriers in the PTB7:PCBM organic photovoltaic blend. In order to accurately describe the recombination behavior of free carriers as measured by time-resolved microwave conductivity (TRMC), this model needs to only take into account free and trapped holes in the polymer, and free electrons in the fullerene. The model is consistent for different PTB7:PCBM blend ratios and spans a light intensity range of over 3 orders of magnitude. Furthermore, the model demonstrates that dark carriers exist in the polymer and interact with photoinduced charge carriers, and that the trapping and detrapping rates of the holes are of high importance to the overall carrier lifetime.
- Report Numbers
- E 1.99:nrel/ja--5900-66893
nrel/ja--5900-66893 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
10/03/2016.
"nrel/ja--5900-66893"
Journal of Physical Chemistry. C 120 43 ISSN 1932-7447 AM
Stefan D. Oosterhout; Andrew J. Ferguson; Bryon W. Larson; Dana C. Olson; Nikos Kopidakis. - Funding Information
- AC36-08GO28308
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