Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 64: Poster: Photovoltaics and Optics
HL 64.17: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P1C
Voltage dependent photoluminescence spectroscopy of dye-sensitized solar cells — •Nico Hofeditz1, Ingo Meyenburg1, Jane Falgenhauer2, Melanie Rudolph2, Nils Rosemann1, Sangam Chatterjee3, Derck Schlettwein2, and Wolfram Heimbrodt1 — 1Department of Physics, Philipps-University Marburg, Renthof 5, 35032 Marburg — 2Institute of Applied Physics, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, 35392 Gießen — 3Institute of Experimental Physics I, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, 35392 Gießen
Dye-sensitized solar cells with indoline dyes D149 and D131 and the squaraine dye SQ2 on mesoporous TiO2 or ZnO have been prepared. The energy level alignment at the organic inorganic interface is important for an optimized electron transfer. We present a new method to determine the band offset. Photoluminescence spectra were recorded with varying applied voltages. Systematical analysis of the spectra shows a significant dependence of the photoluminescence intensity on the applied voltage as well as a small energy shift. The observed characteristics are discussed as interface effects of the dye-semiconductor interface. Time resolved photoluminescence spectroscopy gives further insight into these processes.