Regensburg 2016 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Poster: Organic Electronics and Photovoltaics

CPP 30.12: Poster

Tuesday, March 8, 2016, 18:15–21:00, Poster B2

Energy losses in DIP/PDIR-CN₂ based solar cells. — •Eduard Meister¹, Theresa Linderl¹, Stefan Schmidt¹, Thomas Zechel¹, Paul Beyer², Andreas Opitz², Valentina Belova³, Alexander Hinderhofer³, Frank Schreiber³, and Wolfgang Brütting¹ — ¹Institut für Physik, Universität Augsburg, Germany — ²Institut für Physik, Humboldt-Universität zu Berlin, Germany — ³Institut für Angewandte Physik, Universität Tübingen, Germany

Perylene derivatives are widely used in organic electronics. Depending on the substitution at both ends of the molecular core, either donor- or acceptor-type behaviour is obtained. In this contribution we used diindenoperylene (DIP) as donor and N,N’-bis-(2-ethylhexyl)-1,7-dicyanoperylene-3,4:9,10-bis(dicarboxyimide) (PDIR-CN₂) as acceptor and prepared donor/acceptor (D/A) solar cells with two different architectures: planar hetero junction (PHJ) and planar mixed hetero junction (PM-HJ). The j-V measurements displayed that the open circuit voltage V_OC of both architectures, PM-HJ and PHJ, is equal, where the short circuit current density j_SC as well as the efficiency for the PM-HJ cell is lower than for its PHJ pendant. In addition we determined from electroluminescence (EL) measurement two radiative CT states and from incident photon-to-current efficiency (IPCE) experiment at least four CT states. Taken as a whole, this D/A combination yields very low efficiency, most likely due to a strong interaction between DIP and PDIR-CN₂ accompanied by very high non-radiative energy losses detected with EL and IPCE measurements.