Jan Meiss, Andre Merten, Moritz Hein, Christoph Schuenemann, Stefan Schäfer, Max Tietze, Christian Uhrich, Martin Pfeiffer, Karl Leo and Moritz Riede Fluorinated Zinc Phthalocyanine as Donor for Efficient Vacuum-Deposited Organic Solar Cells Advanced Functional Materials 22
Organic solar cells with bulk heterojunctions of C60 as acceptor and either zinc phthalocyanine (ZnPc), or fluorinated ZnPc (F4ZnPc) as donor materials are presented. Substrate heating of F4ZnPc:C60 devices during film deposition strongly increases fill factor and photocurrent. Furthermore, the replacement of ZnPc by F4ZnPc in otherwise identical devices leads to an improvement of open circuit voltage of 30%, increasing the efficiency from 3.3% (ZnPc:C60) to 4.6% (F4ZnPc:C60).
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