Ho K.-C.Hu C.-W.Varley T.S.2019-05-172019-05-17201597835276798509783527336104https://scholars.lib.ntu.edu.tw/handle/123456789/408630In this chapter, complementary electrochromic devices (ECDs) based on the classical combination of Prussian blue (PB) and viologen, an inorganic/organic ECD, are reviewed. Depending on the formation of both materials, film-type and hybrid-type devices can be fabricated. The PB thin film can be obtained by electrochemical deposition or chemical synthesis, while viologens exist in solution or as solid thin films. The majority of the chapter focuses on the various ways by which scientists have coupled viologens with PB thin films. PB thin film can be obtained from nano-PB particles or mesoporous particles. Furthermore, the effect on the colour made by replacing one, or both, of the iron atoms within PB with another transition metal allows new colours to be formed. Coupling this adaptability with the expansive array of colours already available for viologens provides opportunities for the discovery of new pairings between these two materials groups. ? 2015 Wiley-VCH Verlag GmbH & Co. KGaA.All-solid electrochromic devicesHybrid electrochromic devicesIonic liquid-based ECDMetal hexacyanometallate-viologen-based ECDPB thin filmbook part10.1002/9783527679850.ch42-s2.0-84960285802https://www.scopus.com/inward/record.uri?eid=2-s2.0-84960285802&doi=10.1002%2f9783527679850.ch4&partnerID=40&md5=355c4a7f1725b8818f4493952c100865