Show simple item record

dc.contributor.authorDupont, Stephanie R.
dc.contributor.authorVoroshazi, Eszter
dc.contributor.authorHeremans, Paul
dc.contributor.authorDauskardt, Reinhold H.
dc.date.accessioned2016-02-28T06:31:58Z
dc.date.available2016-02-28T06:31:58Z
dc.date.issued2012-06
dc.identifier.citationDupont SR, Voroshazi E, Heremans P, Dauskardt RH (2012) The effect of anneal, solar irradiation and humidity on the adhesion/cohesion properties of P3HT:PCBM based inverted polymer solar cells. 2012 38th IEEE Photovoltaic Specialists Conference. Available: http://dx.doi.org/10.1109/pvsc.2012.6318272.
dc.identifier.doi10.1109/pvsc.2012.6318272
dc.identifier.urihttp://hdl.handle.net/10754/599898
dc.description.abstractWe use a thin-film adhesion technique that enables us to precisely measure the energy required to separate adjacent layers in OPV cells. We demonstrate the presence of weak interfaces in prototypical inverted polymer solar cells, either prepared by spin, spray or slot-die coating, including flexible and non flexible solar cells. In all cases, we observed adhesive failure at P3HT:PCBM/PEDOT:PSS interface, indicating the intrinsic material dependence of this mechanism. The impact of temperature, solar irradiation and humidity on the adhesion and cohesion properties of this particular interface is discussed. First, we have found that post-deposition annealing increases the adhesion significantly. Annealing changes the morphology in the photoactive layer and consequently alters the chemical properties at the interface. Second, solar irradiation on fully encapsulated solar cells has no damaging but in contrast an enhancing effect on the adhesion properties, due to the heat generated from IR radiation. Finally, the synergetic effect of stress and an environmental species like moisture greatly accelerates the decohesion rate in the weak hygroscopic PEDOT:PSS layer. This results in a loss of mechanical integrity and device performance. The insight into the mechanisms of delamination and decohesion yields general guidelines for the design of more reliable organic electronic devices. © 2012 IEEE.
dc.description.sponsorshipWe acknowledge C. Girotto for his assistance with the spray-coated sample preparation. This research was supported by the Center for Advanced Molecular Photovoltaics (CAMP) supported by King Abdullah University of Science and Technology (KAUST) under award no. KUS-C1–015-21.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.subjectadhesion
dc.subjectannealing
dc.subjectcohesion
dc.subjectenvironmental effects
dc.subjecthumidity
dc.subjectmechanical reliability
dc.subjectsolar irradiation
dc.titleThe effect of anneal, solar irradiation and humidity on the adhesion/cohesion properties of P3HT:PCBM based inverted polymer solar cells
dc.typeConference Paper
dc.identifier.journal2012 38th IEEE Photovoltaic Specialists Conference
dc.contributor.institutionStanford University, Palo Alto, United States
dc.contributor.institutionInteruniversity Micro-Electronics Center at Leuven, Leuven, Belgium
dc.contributor.institutionKU Leuven, 3000 Leuven, Belgium
kaust.grant.numberKUS-C1–015-21
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)


This item appears in the following Collection(s)

Show simple item record