Novel High-Performance and Low-Cost Electrochromic Prussian White Film
Yixin Yang, Yuan Peng, Zelang Jian, Yanyuan Qi, Yuli Xiong, Wen Chen
Abstract
Prussian white (PW), due to its low cost, easy synthesis, open structure, and fast ion extraction/interaction, is introduced to the electrochromic field. The PW films were successfully grown on indium tin oxide (ITO) glass by a facial hydrothermal method. Impressively, the PW film exhibits excellent electrochemical cycling stability without obvious decay over 10 000 cycles and a high coloration efficiency of 149.3 cm2 C–1. The film also provides the large optical transmittance contrast (over 70%) in a wide wavelength range of 650–800 nm. Furthermore, the PW film shows the rapid coloration and bleaching response. These results suggest that PW is a promising practical candidate of high-performance electrochromic material.