IEC 41 |
| Matthew R. Robinson, Department of Materials, Department of Materials, University of California, Santa Barabara, Santa Barbara, CA 93106 |
| Pure near-infrared electroluminescence from a number of conjugated polymer host/guest blends has been realized. The hosts include blue, green, and red emitters. One system makes use of a novel erbium complex doped into a stable green emitting conjugated polymer. The ligand incorporates a pentaphenylenevinylene chelated to the metal center via a beta-diketonate functionality - necessary for efficient energy transfer to the [infrared]atomic transition. The pentaphenylenevinylene fragment endows the ligand with a suitably red absorption to overlap green-emitting polymers, eliminating the need for inferior blue emitters. Emission is observed almost entirely from the lanthanide (without visible emission). A second system makes use of conjugated oligo(porphinato)zinc molecules doped separately in both PVK:PBD and MEH-PPV in order to demonstrate the versatility of these dopant materials afforded by their broad absorption spanning the visible region. Emission entirely in the near-IR is observed which is tunable by increasing the conjugation length by adding additional monomers. Electroluminescence efficiencies up to 0.01 photons per electron are realized. |
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General Papers in Advanced Materials and Nanotechnology (sponsored by Advanced Materials & Nanotechnology Subdivision)
1:30 PM-5:24 PM, Sunday, March 23, 2003 Convention Center -- Room 394, Oral
Division of Industrial and Engineering Chemistry |