Organic light-emitting diode

Details Organic light-emitting diode Organic light-emitting diode

2005-01-04

2005-01-04

Garrett, Dawn (Department: 1774)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C313S504000, C313S506000, C257S102000, C257S103000, C546S082000, C548S359500, C252S301160

Reexamination Certificate

active

06838193

ABSTRACT:
This invention features a dipyrazolo-pyridine compound of formula (I):each of R1, R2, R3, and R4, independently, is H, alkyl, alkenyl, cycloalkyl, aryl, or heteroaryl; and each of R5and R6, independently, is aryl or heteroaryl, or R5and R6, together with the N atom they are attached to, are heteroaryl. The dipyrazolo-pyridine compound can be used in an electro-luminescence device.

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