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Differential Resistance Analysis of Charge Carrier Losses in Organic Bulk Heterojunction Solar Cells: Observing the Transition from Bimolecular to Trap‐Assisted Recombination and Quantifying the Order of Recombination
Author(s) -
Leong Wei Lin,
Cowan Sarah R.,
Heeger Alan J.
Publication year - 2011
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201100196
Subject(s) - recombination , trap (plumbing) , materials science , charge carrier , heterojunction , kinetics , chemical physics , optoelectronics , chemistry , physics , biochemistry , quantum mechanics , meteorology , gene
Differential resistance analysis has been shown to be effective at studying the charge carrier losses in bulk heterojunction solar cells. The variations of differential resistance with light intensity and V oc provide strong evidence for the identification of the recombination kinetics, revealing bimolecular as the dominating recombination mechanism in PCDTBT:PC 60 BM system and showing an evolution to trap‐assisted recombination in presence of PC 84 BM trap states.