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US 9,518,063 B2Granted
Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsChun Lin, Bin Ma, Raymond Kwong, Alexey Borisovich Dyatkin, Yonggang Wu, Zeinab M. Elshenawy
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Abstract
A new class of compounds containing aza-dibenzothiophene or aza-dibenzofuran are provided. The compounds may be used in organic light emitting devices giving improved stability, improved efficiency, long lifetime and low operational voltage. In particular, the compounds may be used as the host material of an emissive layer having a host and an emissive dopant, or as a material in an enhancement layer.
Claims10
A process comprising:
- treating an acetic acid solution of an intermediate having the formula
- wherein one of X1 and X2 is nitrogen and the other of X1 and X2 is carbon and wherein Y is S or O, with tBuONO to produce an aza complex having the formula
- wherein R1 and R2 may represent mono, di, tri, or tetra substitutions;
- wherein R1 is selected from the group consisting of hydrogen, alkyl, aryl, heteroaryl and halide;
- and
- wherein R2 is selected from the group consisting of hydrogen, alkyl, aryl and halide.
3 more elements
Dependencies are inferred from the claim text.