Patent ID: 6329085
Filing Date: 2001-12-11
Classification: C09K,H01L,Y10S

Abstract:
A multicolor light emitting device (LED) structure comprising a plurality of at least a first and a second organic light emitting device (LED) stacked one upon the other to form a layered structure, with each LED separated one from the other by a transparent conductive layer to enable each device to receive a separate bias potential to cause an emission of light through the stack, at least one of the LEDs comprising an emission layer, the emission layer comprising at least one receiving compound, and an emitting compound having a structure represented by Formula II: ##STR13##whereinR.sub.8, R.sub.9, and R.sub.10 are each independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl and substituted aryl;R.sub.9 and R.sub.10, may be combined together to form a fused ring; andM.sup.1 is a divalent metal.