1. Department of Functional Materials University of Bayreuth Universitaetsstrasse 30 Bayreuth 95447 Germany
2. Soft Matter Optoelectronics, Bayreuth Institute of Macromolecular Research (BIMF) and Bavarian Polymer Institute (BPI), Department of Physics University of Bayreuth Universitaetsstrasse 30 Bayreuth 95447 Germany