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Kinetics of light induced defect creation in organic solar cells

 

The kinetics of light-induced recombination centers are measured in bulk heterojunction organic solar cells, as a function of exposure time, intensity and the illumination photon energy. The density of recombination centers increases with exposure time but stabilizes due to self-annealing. UV exposure is roughly ten times as effective for defect creation as white light or yellow-filtered white light for the same exposure intensity. The recombination centers that are created by light are indistinguishable from those created by x-ray irradiation for which the evidence indicates that the breaking of C-H bonds to create H-related localized states is the underlying mechanism.

 
 
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citation

Street, R. A.; Davies, D. Kinetics of light induced defect creation in organic solar cells. Applied Physics Letters. 2013; 102; 043305.

copyright

Copyright © American Institute of Physics, 2013. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters and may be found at http://link.aip.org/link/doi/10.1063/1.4789993.