Reduced operating voltages in polymer light-emitting diodes doped with rare-earth complexes

Robinson MR; Ostrowski JC; Bazan GC; McGehee MD

Advanced Materials, Vol.15, No.18, 1547-1547, 2003

DOI10.1002/adma.200304651 Export Citation

Reduced operating voltages in polymer light-emitting diodes doped with rare-earth complexes

Robinson MR, Ostrowski JC, Bazan GC, McGehee MD

Light-emitting diodes (LEDs) were fabricated using two europium complexes, differing only by the addition of tert-butyl groups around the beta-diketonate ligands (see Figure), blended into poly(2-(6'-cyano-6'-methyl-heptyloxy)1,4-phenylene) (CN-PPP). The addition of tert-butyl groups results in CN-PPP-Eu LEDs with increased operational lifetime and decreased operating voltage.