title: Increasing organic solar cell efficiency with polymer interlayers.
abstract: We demonstrate how organic solar cell efficiency can be increased by introducing a pure polymer interlayer between the PEDOT:PSS layer and the polymer:fullerene blend. We observe an increase in device efficiency with three different material systems over a number of devices. Using both electrical characterization and numerical modeling we show that the increase in efficiency is caused by optical absorption in the pure polymer layer and hence efficient charge separation at the polymer bulkheterojunction interface.
authors.affiliation: Department of Physics and CeNS, Ludwig-Maximilians-Universtität München, Amalienstr. 54, D-80799 München, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Deschler
authors.forename: Daniel
authors.initials: D
authors.lastname: Riedel
authors.forename: Bernhard
authors.initials: B
authors.lastname: Ecker
authors.forename: Elizabeth
authors.initials: E
authors.lastname: von Hauff
authors.forename: Enrico
authors.initials: E
authors.lastname: Da Como
authors.forename: Roderick C I
authors.initials: RC
authors.lastname: MacKenzie