Regensburg 2019 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 14: Poster
DS 14.32: Poster
Dienstag, 2. April 2019, 17:00–20:00, Poster E
In-situ investigation of electrochromic coloration prozesses in tungsten trioxide thin films by optical spectroscopy — •Alexander G. Strack1,2, Jan L. Dornseifer1,2, Simon Burkhardt1,2, Limei Chen1,2, Matthias T. Elm1,2,3, and Peter J. Klar1,2 — 1Institut of Experimental Physics I, Heinrich-Buff-Ring 16, 35392 Giessen, Germany — 2Center for Materials Research (LaMa), Heinrich-Buff-Ring 16, 35392 Giessen, Germany — 3Institute of Physical Chemistry, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
Smart-windows with thin films of tungsten trioxide are helpful for an efficient heat management, since heat transfer though windows may be very high. A well insulated building may save costs. For decreasing heat transfer, it is desirable to understand the microscopic switching properties of the tungstenoxide film and to be able to control the process. With various experimental techniques it is possible to investigate the electrochromic coloring process in thin tungstenoxide films. Raman spectroscopy reveals the different vibrationaly modes of WO6+, WO5+ and WO4+ in poly-crystalline tungsten films. We emply a principal component analysis to correlate the evolution of Raman modes with the coloration process. Corresponding results will be shown and discussed.