The effect of anneal, solar irradiation and humidity on the adhesion/cohesion properties of P3HT:PCBM based inverted polymer solar cells

Handle URI:
http://hdl.handle.net/10754/599898
Title:
The effect of anneal, solar irradiation and humidity on the adhesion/cohesion properties of P3HT:PCBM based inverted polymer solar cells
Authors:
Dupont, Stephanie R.; Voroshazi, Eszter; Heremans, Paul; Dauskardt, Reinhold H.
Abstract:
We 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.
Citation:
Dupont 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.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2012 38th IEEE Photovoltaic Specialists Conference
KAUST Grant Number:
KUS-C1–015-21
Issue Date:
Jun-2012
DOI:
10.1109/pvsc.2012.6318272
Type:
Conference Paper
Sponsors:
We 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.
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Full metadata record

DC FieldValue Language
dc.contributor.authorDupont, Stephanie R.en
dc.contributor.authorVoroshazi, Eszteren
dc.contributor.authorHeremans, Paulen
dc.contributor.authorDauskardt, Reinhold H.en
dc.date.accessioned2016-02-28T06:31:58Zen
dc.date.available2016-02-28T06:31:58Zen
dc.date.issued2012-06en
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.en
dc.identifier.doi10.1109/pvsc.2012.6318272en
dc.identifier.urihttp://hdl.handle.net/10754/599898en
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.en
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.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectadhesionen
dc.subjectannealingen
dc.subjectcohesionen
dc.subjectenvironmental effectsen
dc.subjecthumidityen
dc.subjectmechanical reliabilityen
dc.subjectsolar irradiationen
dc.titleThe effect of anneal, solar irradiation and humidity on the adhesion/cohesion properties of P3HT:PCBM based inverted polymer solar cellsen
dc.typeConference Paperen
dc.identifier.journal2012 38th IEEE Photovoltaic Specialists Conferenceen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
dc.contributor.institutionInteruniversity Micro-Electronics Center at Leuven, Leuven, Belgiumen
dc.contributor.institutionKU Leuven, 3000 Leuven, Belgiumen
kaust.grant.numberKUS-C1–015-21en
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en
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