Dresden 2006 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 31: Organic semiconductors

HL 31.6: Vortrag

Mittwoch, 29. März 2006, 15:45–16:00, POT 51

Time resolved luminescence quenching experiments with dicyanovinylene-terthiophene — •André Holzhey, Karl Leo, and Michael Hoffmann — Institut für Angewandte Photophysik, TU Dresden

Dicyanovinylene-terthiophene (DCV3T) as a new promising material for solar cell applications [1] shows intensive luminescence and exciton diffusion but also photo-degradation. CW and time-resolved photoluminescence and luminescence quenching of DCV3T shows exciton diffusion properties of DCV3T and permits a detailed view on the exciton diffusion mechanism. Using a spectrofluorometer and a streak camera setup, the surface luminescence quenching in double layers is investigated for various layer thicknesses and temperatures. By investigation of various degradation processes, the influence of degradation on the experiment could be minimized. The results indicate that luminescence quenching affects at least two different exciton levels in DCV3T.

[1] C. Uhrich, R. Schüppel, A. Petrich, K. Leo and M. Pfeiffer, E. Brier, P. Kilickiran, P. Bäuerle, to be submitted.