Subnanosecond charge photogeneration and recombination in polyfluorene copolymerfullerene solar cell: Effects of electric field
Optics Express, ISSN: 1094-4087, Vol: 21, Issue: 102, Page: A241-A249
2013
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Article Description
Influence of electric field on the subnanosecond charge photogeneration dynamics in the polymer solar cell based on polyfluorene copolymer BisDMO-PFDTBT blended with PC61BM was examined with transient absorption spectroscopy. The charge dynamics showed no difference under short- or open-circuit conditions and under a forward bias of 0.79 V (1.6 × 105 V/cm), implying negligible field effects on the subnanosecond dynamics of charge photogeneration/recombination. However, under the reverse biases of -2 V (4.0 × 105 V/cm) and -5 V (1.0 × 106 V/cm), significant enhancement of charge photogeneration and apparent suppression of polaron pair recombination were observed, which agrees with the field-assisted enhancement of external quantum efficiency of the solar cell devices. © 2013 Optical Society of America.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84875199130&origin=inward; http://dx.doi.org/10.1364/oe.21.00a241; http://www.ncbi.nlm.nih.gov/pubmed/23482286; https://www.osapublishing.org/oe/abstract.cfm?uri=oe-21-S2-A241; https://www.osapublishing.org/viewmedia.cfm?URI=oe-21-S2-A241&seq=0; https://opg.optica.org/oe/abstract.cfm?uri=oe-21-S2-A241; https://dx.doi.org/10.1364/oe.21.00a241
The Optical Society
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