title: A fullerene-based organic exciton blocking layer with high electron conductivity.
abstract: We demonstrate the concentration dependence of C60 absorption in solid solutions of C60 and bathocuprione (BCP), revealing a nonlinear decrease of the C60 charge transfer (CT) state absorption. These blends are utilized to study the photocurrent contribution of the CT in bilayer organic photovoltaics (OPVs); 1:1 blends produce 40% less photocurrent. As exciton blocking electron transporting layers, the blends achieve power conversion efficiencies of 5.3%, an increase of 10% compared to conventional buffers.
authors.affiliation: Department of Chemical Engineering and ‡Department of Chemistry, University of Southern California , Los Angeles, California 90089, United States.
authors.forename: Andrew N
authors.initials: AN
authors.lastname: Bartynski
authors.forename: Cong
authors.initials: C
authors.lastname: Trinh
authors.forename: Anurag
authors.initials: A
authors.lastname: Panda
authors.forename: Kevin
authors.initials: K
authors.lastname: Bergemann
authors.forename: Brian E
authors.initials: BE
authors.lastname: Lassiter
authors.forename: Jeramy D
authors.initials: JD
authors.lastname: Zimmerman
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Forrest
authors.forename: Mark E
authors.initials: ME
authors.lastname: Thompson