Regensburg 2013 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: New Instruments and Methods
CPP 8.2: Poster
Monday, March 11, 2013, 17:30–19:30, Poster C
Fluorescence Lifetime Imaging Microscopy in the Frequency Domain — •Stephanie Zahner1, Lothar Kador1, Inga Elvers1, Jürgen Köhler1, Kerim R. Allahverdi2, and Eldar Yu. Salaev3 — 1University of Bayreuth, Institute of Physics and Bayreuther Institut für Makromolekülforschung (BIMF), Bayreuth, Germany — 2Marmara Research Centre of TÜBITAK, Materials Institute, Gebze/Kocaeli, Turkey — 3Azerbaijan National Academy of Sciences, Institute of Physics, Baku, Azerbaijan
A custom-built, low-cost Fluorescence Lifetime Imaging Microscope (FLIM) working in the frequency domain has been optimized and tested with three different materials. In addition to two-dimensional FLIM images, the results are shown in polar plot representation. Polymer matrices (PMMA and PVA) doped with Rhodamine 6G were used for characterizing the setup and the evaluation method. Films of the organic polymeric semiconductor P3HT show a distribution of short lifetimes below one nanosecond in combination with a longer lifetime component. The data points of the layered chalcogenide semiconductor Gallium-Selenid (GaSe) are spread over a wide range in the polar plot, some of them lying distinctly outside the semicircle. This effect is ascribed to the superlinear variation of the material's photoluminescence with the excitation light and has not been described in literature before.