Electrochromic properties of thin films in modified electrodes.

Electrochormic properties of thin films of polymers as the active layer are reviewed with emphasis on the basic mechanisms of the electron transfer reaction in the modified layer. These include the concept of the electrochemistry of modified electrodes. Various typical examples for preparing thin films have been discussed. Organic as well as inorganic polymers such as Prussian blue can be applied for electrochromic display devices without critical problems of device lifetime and degradation.