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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices
SYOP 4: Organic Photovoltaics: from Single Molecules to Devices
SYOP 4.23: Poster
Donnerstag, 26. März 2009, 16:30–19:00, P1A
Organic Photovoltaic Cells Employing Diindeno-Perylene Thin Films — •Martin Meseth1, Tobias Roller2, and Jens Pflaum1,3 — 1Julius-Maximilians-University of Würzburg, Experimental Physics VI, D-97074 Würzburg — 2Universität Stuttgart, 3. Phys. Inst., D-70569 Stuttgart — 3Bavarian Centre for Applied Energy Research e.V. (ZAE Bayern), D-97074 Würzburg
A crucial factor for the efficiency in organic photovoltaic (OPV) cells made of small molecules is the exciton diffusion length of the absorbing material. Diindenoperylene (DIP) has shown to have an exciton diffusion length in the order of 100nm which can be attributed to its high crystallinity [Kurrle et al., APL 92(2008), 133306]. However, its use in OPV cells is limited by the weak absorption due to the disadvantageous orientation of the optical transition dipole.
In our study we examined OPV cells using DIP as donor material in combination with various acceptor molecules such as C60. By this combinative approach, the degree of crystallinity in DIP could be varied and the impact of the corresponding cell efficiencies will be discussed.
The properties of the respective organic-metal contacts will also be adressed.