Regensburg 2007 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 6: Organic Photovoltaics (SYOE 2)

DS 6.2: Vortrag

Montag, 26. März 2007, 16:15–16:30, H32

Efficient photon harvesting strategies in ZnPc/PPV/Fullerene solar cells — •Robert Koeppe¹, Pavel A. Troshin², Rimma N. Lyubovskaya², and N. Serdar Sariciftci¹ — ¹LIOS, Altenbergerstr. 69, A-4040 Linz, Austria — ²Institute of Problems of Chemical Physics of RAS, Chernogolovka, Moscow region, 142432, Russia

A novel multicomponent organic solar cell architecture is suggested in order to expand the active layer absorption of organic solar cells by a combination of solution-processed bulk heterojunction polymer/fullerene cells with bilayer ZnPc/fullerene devices [1]. For this purpose, a blend of different fullerene derivatives with the conjugated polymer MDMO-PPV is spin-coated on an evaporated ZnPc film. Supramolecular complexation of the highly soluble pyrrolidinofullerene with ZnPc ensures a very efficient charge separation [2] and therefore a high contribution of the ZnPc to the overall photocurrent generation. This yields photovoltaic devices that demonstrate power conversion efficiencies above 2% and efficient photocurrent generation of up to 20% external quantum yield in the full range from 350 nm to 820 nm. [1] R. Koeppe et al., APL 87(24), 244102, [2] R. Koeppe et al., Full. Nanotub. Carb. Nanostruct. 14(2-3), 441-446