High performance light emitting polymers for colour displays

We report the latest developments in light emitting polymer (LEP) systems, including much improved blue device performance, developed at CDT. We also describe a high brightness, low voltage yellow system which is particularly suitable for use in passive matrix displays. Finally we describe materials improvements for red, green and blue which together with the co-development of a direct patterning technique, with the Seiko Epson Corporation, has lead to the production of a 16 grey-level full colour active matrix LED display.