Heterogeneous spiro compounds in organic light emitting...

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Reexamination Certificate

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C428S917000, C252S301160, C313S504000, C313S506000, C546S018000, C549S331000, C556S406000

Reexamination Certificate

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07014925

ABSTRACT:
A family of non-polymeric heterogeneous spiro compounds having visible light emissive, hole-transport, electron transport or bipolar-transport properties may be used in organic light emitting devices (OLEDs), as an emissive layer in the OLEDs and/or in one or more of the charge transport layers, or as a host material for one or more of such layers.

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