Blue photo- and electroluminescence based on poly(2-benzoyl-1,4-phenylene)and poly(2,5-dibenzoyl-1,4-phenylene)

Poly(2-benzoyl-1,4-phenylene) (PBP) and poly(2,5-dibenzoyl-1,4-phenylene) ( PDBP) were synthesized by coupling polymerization using a Ni catalyst of 2, 5-dichlorobenzophenone and 2,5-dichoro-1,4-dibenzophenone, respectively. Th ese polymers are soluble in common organic solvents, have high thermal stab ility and show bright blue photoluminescence. Light-emitting diodes fabrica ted with these polymers as the active layer emit blue electroluminescence w ith wavelength at 433 nm for PDBP. Copyright (C) 1999 John Wiley & Sons, Lt d.