title: Optical constants of electrochromic films and contrast ratio of reflective electrochromic devices.
abstract: This study investigates the optical constants of WO3 electrochromic films and NiO ion-storage films in bleached and colored states and that of a Ta2O5 film used as an ion conductor. These thin films were all prepared by electron-beam evaporation and characterized using a spectroscopic ellipsometer. The spectra obtained using a spectrophotometer and those calculated from the optical constants agreed closely. An all-solid thin-film reflective electrochromic device was fabricated and discussed. Its mean contrast ratio of reflectance in the range of 400-700 nm was 37.91.
authors: Cheng-Chung
authors: CC
authors: Jaing
authors: Chien-Jen
authors: CJ
authors: Tang
authors: Chih-Chao
authors: CC
authors: Chan
authors: Kun-Hsien
authors: KH
authors: Lee
authors: Chien-Cheng
authors: CC
authors: Kuo
authors: Hsi-Chao
authors: HC
authors: Chen
authors: Cheng-Chung
authors: CC
authors: Lee