Web Release Date: February 27,
Conjugated Oligoelectrolyte Electron Transport/Injection Layers for Organic Optoelectronic Devices
and
Department of Chemistry and Biochemistry, Department of Materials, Institute for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China
Received December 13, 2007
Abstract:
The function of a conjugated oligoelectrolyte (COE) as the electron transport layer (ETL) in polymer light emitting diodes is demonstrated. Current density-luminance-voltage characteristics demonstrate that insertion of the COE adjacent to an Al electrode yields higher device efficiencies than those obtained using the low work function cathode Ba. Furthermore, the temporal response of the electroluminescence is faster than that observed when using conjugated polyelectrolytes as the ETL. That COEs have better defined structures than their polymeric counterparts may make them more attractive materials for the fabrication of efficient PLEDs prepared by spin coating methods.
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