%0 Conference Paper
%A Yan Ping Ma
%A Phillip C Yu
%A Carl M Lampert
%B SPIE Proceedings 1536
%C San Diego, CA
%D 1991
%G eng
%L LBL-31173
%T Development of Laminated Nickel/Manganese Oxide and Nickel/Niobium Oxide Electrochromic Devices
%1 <p>Windows and Daylighting Group</p>
%2 LBL-31173
%8 07/1991
%X <p>We report on the prepation, electrical and optical analysis of eIectrodes and prototype electrochromic devices using a solid polymer ion conductor. For these devices we developed electrodes consisting of cobalt-doped nickel oxide, manganese-nickel oxide, and niabium oxide. Optical and voltammetric data was obtained for each electrode. Solid polymer electrolytes were synthesized from modified amorphous poly(ethy1ene oxide) [a-PEO] complexed with a metal silicate. Electrochromic devices were made using cobalt-doped nickel oxide/niobium oxide, and cobalt-doped nickel oxide/manganese-nickel electrode laminations. Optical spectra as a function of voltage was obtained for each device. Our best cobalt-doped nickel oxide/a-PEO/rnanganese-nickel oxide device showed photopic transmittance to be T<sub>p</sub>(bleached)=0.76 and T<sub>p</sub>(colored)=0.44. The corresponding integrated solar transmittance was T<sub>s</sub>(bleached)=0.64, T<sub>s</sub>(colored)=0.46. Our best cobalt-doped nickel oxide/a-PEO/niobium oxide device had photopic transmittance of T<sub>p</sub>(bleached)=0.65 and T<sub>p</sub>(colored)=0.16. The corresponding integrated solar transmittance was T<sub>s</sub>(bleached)=0.45 and T<sub>s</sub>(colored)=0.15. Of the two devices, the nickel/niobium oxide device had the best combination of electrical and optical properties. Better device properties are expected with improvements in the solid polymer electrolyte and lamination process.</p>