Abstract
The electrochromic cell, which consisted of transparent conductive substrate, electrolyte and nano-crystalline titania thin film modified with viologen was assembled. The solvent dependency on kinetic of these cells was mainly investigated. When polyethylene glycol (PEG) was used as a solvent, the cell clearly indicated fast electrochromic reaction under an applied potential of 3.0 V. The polyethylene glycol (molecular weight: 200) electrolyte was showed the best performance for keeping a strong coloration state for more than one month without any applied potential, thus making it an attractive candidate for paper-like displays with low energy consumptions.
