LONG OPERATING LIFE FOR POLYMER LIGHT-EMITTING DIODES

摘要

Long-lived organic light-emitting diodes are achieved by positioning a layer (15) comprising polyaniline in the emeraldine salt form directly contiguous with the anode side of the active light-emitting layer (14). Particular advantages are achieved if the emeraldine salt-containing layer (15) has a sheet resistance of at least about 1000 ohms per square which can be achieved by casting the layer (15) from solution in a polar solvent, most particularly, DMSO.