The present invention relates to polymers comprising diazine, especially
pyrimidine, containing repeating units. Optical devices, comprising the
polymers of the present invention, can show significant advantages in
color purity, device efficiency and/or operational lifetime. In addition,
the polymers can have good solubility characteristics and relatively high
glass transition temperatures, which facilitates their fabrication into
coatings and films that are relatively thin, thermally stable, and
relatively free of defects.