Electrochromic Display Device With Memory Based On Homogeneous Donor Polymer Films
Original Publication Date: 1979-Dec-01
Included in the Prior Art Database: 2005-Feb-20
Polymeric materials have, until recently, been largely ignored for electronic applications, such as thin-film electrochromics, even though they offer a number of important advantages as compared to the traditional inorganic systems. These advantages include the ease of large scale film formation, the ability to synthetically vary the chemical/ electronic properties of the system, and the rather straightforward procedures that have been developed to insure good polymer film adhesion to substrate materials. The first polymeric electrochromic materials (the poly (viologens)), however, were largely unsuccessful due to problems with control of the polymer film morphology and with the electronic nature of the electroactive species, the viologen acceptor molecule in this case.