Dresden 2020 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 32: Poster: Optical Analysis of Thin Films
DS 32.6: Poster
Mittwoch, 18. März 2020, 15:00–18:00, P1A
IN-SITU INVESTIGATION OF ELECTROCHROMIC RADIATION PROCESSES IN TUNGSTEN TRIOXIDE THIN FILMS BY OPTICAL SPECTROSCOPY — •Alexander Strack1, Simon Burkhardt1,2 und Peter J. Klar1,2 — 1Institute of Experimental Physics I, Heinrich-Buff-Ring 16, 35392 Giessen — 2Center for Materials Research(LaMa), Heinrich-Buff-Ring 16, 35392 Giessen
Smart-Windows with thin films of tungsten trioxide in the fenestration of buildings help to regulate heat transfer though windows and thus to reduce energy consumption for climatization.This approach is coast efficient and may contribute significantly to CO2 reduction in the atomsphere. For the best performance of the smart window it is essential to understand what happens in the tungsten film and how to optimize the coloration process. Different spectroscopic techniques are employed to investigate the electrochromic coloring process in thin tungsten films. Ramanspectroscopy reveals the differant crystalline phases of WO3 which occur during coloration. Simultaneous measuring the absorption and the current allows one to correlate the degree of coloration with the incorporated charge and with the crystalline phase of the material.