SPP1355:Charge separation at nanostructured molecular donor-acceptor interfaces III

Organic donor and acceptor molecules represent an important class of materials for solar energy conversion.
The focus of this project is to combine the expertise of four experimental groups to address the correlation
between film and interface morphology and the photoelectrical properties of excitonic solar cells.
The goal of this multilateral approach is to develop a detailed understanding of the correlation between
structural and electronic properties, microscopic transport phenomena and macroscopic parameters determining
solar cell performance for different prototypes of donor and acceptor materials. In the first two
funding periods we have studied a variety of D/A combinations, both in planar heterojunctions as well as
in bulk-heterojunctions, in order to identify different growth behaviour and to estimate their potential in
OPV cells. In this final phase of the project we will now focus our efforts on selected, particularly promising
D/A pairs, e.g. those containing diindenoperylene as acceptor moiety, and develop a general understanding
of molecular solar cells by bringing together all the information obtained by our synergetic approach.
This also includes interfaces between organic layers and metal electrodes as well as environmental
effects and materials purity.