Patent ID: 7078113

Claim:
A light emitting device comprising a hole transporting layer, wherein said hole transporting layer comprises at least one metal complex, and wherein said metal complex has one of the formulas I or II: wherein: M′ and M′″ are each, independently, a metal atom; R 10 , R 13 , R 20 and R 21 are each, independently, N or C; R 11 and R 12 are each, independently, N or C; Ring systems A, B, G, K and L are each independently a mono-, di- or tricyclic fused aliphatic or aromatic ring system optionally containing up to 5 hetero atoms; Z is C 1 –C 6 alkyl, C 2 –C 8 mono- or poly alkenyl, C 2 –C 8 mono- or poly alkynyl, or a bond; and Q is BH, N, or CH.