Regensburg 2004 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 16: POSTER: Computational Physics, Complex Systems

CPP 16.33: Poster

Tuesday, March 9, 2004, 17:00–19:00, B

Confocal Raman Spectroscopy of Ruthenium Dyes and their Application in Organic Solar Cells — •Carmen Pérez León¹, Lothar Kador¹, Bin Peng², and Mukundan Thelakkat² — ¹University of Bayreuth, Institute of Physics and Bayreuther Institut für Makromolekülforschung (BIMF), 95440 Bayreuth — ²University of Bayreuth, Makromolekulare Chemie I and Bayreuther Institut für Makromolekülforschung (BIMF), 95440 Bayreuth

With confocal Raman spectroscopy we investigated a new Ru dye (Ru-TPA₂) and compared it with a similar commercial compound (N179). We measured the spectra of the dyes in powder, in solution, and in a solution containing silver nanoparticles to obtain surface enhancement effects (SERS). Since we are interested in the performance of the dyes in solid-state organic solar cells, we recorded their signals when they were chemisorbed on TiO₂ nanoparticles and contained in the complete photovoltaic cells. In the latter case, to identify characteristic Raman lines and assign them to specific compounds, we also measured the spectra of cells, in which only part of the constituents were present. The spectra show some peaks which indicate the formation of new chemical bonds between the constituents.