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dc.contributor.authorTessarolo, Marta
dc.contributor.authorGuerrero, Antonio
dc.contributor.authorGedefaw, Desta
dc.contributor.authorBolognesi, Margherita
dc.contributor.authorProsa, Mario
dc.contributor.authorXu, Xiaofeng
dc.contributor.authorMansour, Mahdi
dc.contributor.authorWang, Ergang
dc.contributor.authorSeri, Mirko
dc.contributor.authorAndersson, Mats R.
dc.contributor.authorMuccini, Michele
dc.contributor.authorGarcia-Belmonte, Germà
dc.date.accessioned2016-02-18T11:20:19Z
dc.date.available2016-02-18T11:20:19Z
dc.date.issued2015-10
dc.identifier.citationTESSAROLO, Marta, et al. Predicting thermal stability of organic solar cells through an easy and fast capacitance measurement. Solar Energy Materials and Solar Cells, 2015, vol. 141, p. 240-247.ca_CA
dc.identifier.urihttp://hdl.handle.net/10234/150566
dc.description.abstractDegradation of organic photovoltaic (OPV) devices is currently a topic under intense research as it is one of the main limitations towards the commercialization of this technology. Morphological changes at both active layer and interfaces with the outer contacts are believed to determine main key issues to be overcome. In-line techniques are essential to rule out any effect arising during sample fabrication. Unfortunately, the number of physical techniques able to provide morphological information on complete and operational devices is certainly limited. In this work, we study the thermal degradation of bulk heterojunction (BHJ) solar cells composed by different donor polymers with techniques developed to provide in-situ information on operational devices. Capacitance measurement as a function of temperature monitors the electrical integrity of the active layer and provides the threshold temperature (TMAX) at which the whole device becomes thermally unstable. We found a direct correlation between the threshold temperature TMAX, obtained by capacitance–temperature measurements on complete OPV devices, and the power conversion efficiency decay measured at 85 °C. Devices tend to be thermally stable when the temperature of the thermal stress is below TMAX, while above TMAX evident changes in the active layer or at the active layer/electrode interface are also detected by confocal fluorescence microscopy. The capacitance method gives precious guidelines to predict the thermal stability of BHJ solar cells using an accelerated and easy test.ca_CA
dc.format.extent7 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherElsevierca_CA
dc.relation.isPartOfSolar Energy Materials and Solar Cells Volume 141, October 2015ca_CA
dc.rightsCopyright © 2014 Elsevier B.V. All rights reserved.ca_CA
dc.subjectThermal stabilityca_CA
dc.subjectCapacitanceca_CA
dc.subjectBulk heterojunctionca_CA
dc.subjectConfocal microscopyca_CA
dc.subjectThermal degradationca_CA
dc.subjectMorphological changesca_CA
dc.titlePredicting thermal stability of organic solar cells through an easy and fast capacitance measurementca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1016/j.solmat.2015.05.041
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_CA
dc.relation.publisherVersionhttp://www.sciencedirect.com/science/article/pii/S0927024815002585ca_CA


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