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dc.contributor.authorGuerrero, Antonio
dc.contributor.authorHeidari, Hamed
dc.contributor.authorRipollés Sanchis, Teresa
dc.contributor.authorKovalenko, Alexander
dc.contributor.authorPfannmöller, Martin
dc.contributor.authorBals, Sara
dc.contributor.authorKaufmann, Louis-Dominique
dc.contributor.authorBisquert, Juan
dc.contributor.authorGarcia-Belmonte, Germà
dc.date.accessioned2017-02-07T12:39:56Z
dc.date.available2017-02-07T12:39:56Z
dc.date.issued2015
dc.identifier.citationGUERRERO, Antonio, et al. Shelf life degradation of bulk heterojunction solar cells: Intrinsic evolution of charge transfer complex. Advanced Energy Materials, 2015, vol. 5, no 7.ca_CA
dc.identifier.issn1614-6832
dc.identifier.issn1614-6840
dc.identifier.urihttp://hdl.handle.net/10234/165892
dc.description.abstractAchievement of long-term stability of organic photovoltaics is currently one of the major topics for this technology to reach maturity. Most of the techniques used to reveal degradation pathways are destructive and/or do not allow for real-time measurements in operating devices. Here, three different, nondestructive techniques able to provide real-time information, namely, film absorbance, capacitance–voltage (C–V), and impedance spectroscopy (IS), are combined over a period of 1 year using non-accelerated intrinsic degradation conditions. It is discerned between chemical modifications in the active layer, physical processes taking place in the bulk of the blend from those at the active layer/contact interfaces. In particular, it is observed that during the ageing experiment, the main source for device performance degradation is the formation of donor–acceptor charge-transfer complex (math formula–math formula) that acts as an exciton quencher. Generation of these radical species diminishes photocurrent and reduces open-circuit voltage by the creation of electronic defect states. Conclusions extracted from absorption, C–V, and IS measurements will be further supported by a range of other techniques such as atomic force microscopy, X-ray diffraction, and dark-field imaging of scanning transmission electron microscopy on ultrathin cross-sections.ca_CA
dc.description.sponsorShipThis work was partially supported by the FP7 European collaborative project SUNFLOWER (FP7-ICT-2011–7 Contract No. 287594), and the Generalitat Valenciana (Project No. ISIC/2012/008, Institute of Nanotechnologies for Clean Energies). S.B. acknowledges financial support from the European Research Council (ERC Starting Grant No. 335078-COLOURATOMS). A.K. acknowledges Brno University of Technology for financial support (CZ.1.07/2.3.00/30.0039). M.P. gratefully acknowledges the SIM NanoForce program for their financial support. The authors would like to thank Dr. Beatriz Julián López for her support to carry out the absorption measurements using the integrating sphere.ca_CA
dc.format.extent8 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherWileyca_CA
dc.relation.isPartOfAdvanced Energy Materials, 2015, vol. 5, no 7ca_CA
dc.rightsCopyright © John Wiley & Sonsca_CA
dc.subjectorganic photovoltaicsca_CA
dc.subjectdegradationca_CA
dc.subjectshelf lifeca_CA
dc.subjectcharge transfer complexca_CA
dc.titleShelf Life Degradation of Bulk Heterojunction Solar Cells: Intrinsic Evolution of Charge Transfer Complexca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1002/aenm.201401997
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://onlinelibrary.wiley.com/doi/10.1002/aenm.201401997/fullca_CA


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