ORGANIC POLYMER LEDS WITH MOBILE AND IMMOBILE IONS

The syntheses of partially conjugated alkoxy substituted Poly(p-phenyl enevinylene) (PPV) materials with tertiary amines and cationic species covalently bound to the polymer backbone are described. The amine/cat ionic species are introduced via a polymer analogous reaction of a fun ctional alcohol and the chloro-precursor polymer. Single layer, polyme r light emitting diodes (PolyLEDs), prepared with the modified polymer materials show a strong 'burn-in' effect, leading to very high electr oluminescence (EL) quantum efficiencies especially with higher workfun ction cathodes.