Show simple item record

dc.contributor.authorGuerrero, Antonio
dc.contributor.authorDörling, Bernhard
dc.contributor.authorRipollés Sanchis, Teresa
dc.contributor.authorAghamohammadi, Mahdieh
dc.contributor.authorBarrena, Esther
dc.contributor.authorCampoy-Quiles, Mariano
dc.contributor.authorGarcia-Belmonte, Germà
dc.identifier.citationACS NANO, 7 (5) (2013), p. 4637-4646ca_CA
dc.description.abstractInterfaces play a determining role in establishing the degree of carrier selectivity at outer contacts in organic solar cells. Considering that the bulk heterojunction consists of a blend of electron donor and acceptor materials, the specific relative surface coverage at the electrode interfaces have an impact on the carrier selectivity. This work unravels how fullerene surface coverage at cathode contacts lies behind the carrier selectivity of the electrodes. A variety of techniques as variable-angle spectroscopic ellipsometry and capacitance-voltage measurements have been used to determine the degree of fullerene surface coverage in a set of PCPDTBT-based solar cells processed with different additives. A full screening from highly fullerene-rich to polymer-rich phases attaching the cathode interface has enabled the overall correlation between surface morphology (relative coverage) and device performance (operating parameters). The general validity of the measurements is further discussed in four donor/acceptor systems: PCPDTBT, P3HT, PCDTBT and PTB7 blended with fullerene derivatives. It is demonstrated that a fullerene rich interface at the cathode is a prerequisite to enhance contact selectivity, and consequently power conversion efficiency.ca_CA
dc.format.extent27 p.ca_CA
dc.publisherACS Publicationsca_CA
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 Spain*
dc.subjectOrganic Solar Cellsca_CA
dc.subjectMetal-Organic Interfacesca_CA
dc.subjectVertical Segregationca_CA
dc.subjectSurface Coverageca_CA
dc.subjectContact Selectivityca_CA
dc.titleInterplay Between Fullerene Surface Coverage and Contact Selectivity of Cathode Interfaces in Organic Solar Cellsca_CA

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-ShareAlike 3.0 Spain
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 3.0 Spain