Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 92: Postersession DS/HL

HL 92.4: Poster

Donnerstag, 10. März 2016, 16:00–19:00, Poster A

Spectroelectrochemical Response of Half Cells for Solid-state Electrochromic Devices — •Christian Lupo¹, Yurong Su², Angelika Polity², and Derck Schlettwein¹ — ¹Institute of Applied Physics, Justus Liebig University Giessen, Heinrich Buff-Ring 16, 35392 Giessen, Germany. — ²1st Physics Institute, Justus Liebig University Giessen, Heinrich Buff-Ring 16, 35392 Giessen, Germany

Electrochromic devices made by solid-state components only could provide longer lifetimes or faster switching speeds compared with currently produced devices ("smart windows", "smart mirrors") with polymeric or liquid electrolytes. Lithium phosphorous oxynitride (LiPON) is a promising candidate as a solid electrolyte for use in electrochromic devices. Thin films of LiPON could replace the relatively thick electrolytes based on a Lithium salt in liquid or polymeric compounds because of a high chemical stability and good transparency of LiPON. In the present study, LiPON is used in combination with tungsten oxide (WO_x) or nickel oxide (NiO), both well-known electrochromic materials which become colored upon chemical reduction or oxidation, respectively. On the way to an all-solid-state device, the first challenges consist in reaching a good ionic conducting solid electrolyte and well-working solid contacts. Electrochemical and spectroelectrochemical measurements are used to characterize the response and the coloration performance of electrochromic half cells consisting of combinations of WO_x/LiPON or LiPON/NiO solid layers prepared via combinations of sputtering and/or chemical bath deposition methods.