Completion of the three primary colours: the final step toward plastic displays

A completion of the three primary colours (red, green and blue (RGB)) in conjugated polymeric electrochromics is enough to produce any shade of desired colour for plastic displays. Until our first report about a green-coloured neutral conjugated polymer (CP) [G. Sonmez, C. K. F. Shen, Y. Rubin and F. Wudl, Angew. Chem., Int. Ed. Engl., 2004, 43, 1498; G. Sonmez, H. B. Sonmez, C. K. F. Shen, R. W. Jost, Y. Rubin and F. Wudl, Macromolecules, 2005, in press; G. Sonmez, H. B. Sonmez, C. K. F. Shen and F. Wudl, Adv. Mater., 2004, 16, 1905; refs. 1-3], researches on CPs as electrochromics have mainly focused on red and blue colours. In this article we describe the advantages of CPs as electrochromics and the importance of having RGB colours in polymeric electrochromic devices.