Interlayer adhesion in roll-to-roll processed flexible inverted polymer solar cells

Publication: Research - peer-reviewConference article – Annual report year: 2011

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The interlayer adhesion of roll-to-roll processed flexible inverted P3HT:PCBM bulk heterojunction (BHJ) polymer solar cells is reported. Poor adhesion between adjacent layers may result in loss of device performance from delamination driven by the thermomechanical stresses in the device. We demonstrate how a thin-film adhesion technique can be applied to flexible organic solar cells to obtain quantitative adhesion values. For the P3HT:PCBM-based BHJ polymer solar cells, the interface of the BHJ with the conductive polymer layer PEDOT:PSS was found to be the weakest. The adhesion fracture energy varied from 1.6 J/m2 to 0.1 J/m2 depending on the composition of the P3HT:PCBM layer. Post-deposition annealing time and temperature were shown to increase the adhesion at this interface. Additionally the PEDOT:PSS cells are compared with V2O5 cells whereby adhesive failure marked by high fracture energies was observed.
Original languageEnglish
JournalSolar Energy Materials & Solar Cells
Publication date2012
Volume97
Pages171-175
ISSN0927-0248
DOIs
StatePublished

Conference

ConferenceGlobal Organic PhotoVoltaic Conference
CountryChina
CityHangzhou
Period10/10/1112/10/11
CitationsWeb of Science® Times Cited: 45

Keywords

  • Polymer solar cells
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