Optical Properties Of Electrochromic Nickel Oxide Devices Utilizing A Polymeric Electrolyte

A. Pennisi; C. M. Lampert

doi:10.1117/12.949923

6 March 1989 Optical Properties Of Electrochromic Nickel Oxide Devices Utilizing A Polymeric Electrolyte

A. Pennisi, C. M. Lampert

Proceedings Volume 1016, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VII; (1989) https://doi.org/10.1117/12.949923
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

We describe the preparation and optical analysis of experimental electrochromic switching devices. These devices utilize hydrated nickel oxide as the electrochromic material, with fluorine-doped tin oxide as the counter-electrode layer and polymeric quarternary ammonium hydroxide as the electrolyte. The polymer electrolyte was synthesized from an quaternary ammonium chloride polymer by ion exchange between and OH- ions. The exchange was accomplished by using either an ion exchange resin or membrane dialysis. Voltammetric and optical measurements are compared for devices using the two polymeric electrolytes. The best device performance was achieved using the dialysis-hydroxylated polymer. We investigated the optical switching properties of devices under static and dynamic conditions. We also observed that adding lithium atoms in the nickel oxide layer improves the performance of the devices by reducing the switching time and increasing the transmittance modulation range. Our best device to date (not yet optimized) showed the integrated photopic transmittance (T_p) to be T_p(bleached)=0.70 and T_p(colored)=0.21. The corresponding solar transmittance (T_s) was T_s(bleached)=0.50, T_s(colored)=0.23. A device without the polymer electrolyte had optical properties of T_s(empty)=0.44 and T_p(empty)=0.57.

Citation Download Citation

A. Pennisi and C. M. Lampert "Optical Properties Of Electrochromic Nickel Oxide Devices Utilizing A Polymeric Electrolyte", Proc. SPIE 1016, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VII, (6 March 1989); https://doi.org/10.1117/12.949923

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