Patent ID: 7279704
Filing Date: 2007-10-09
Classification: C09K,H01L,H05B

Abstract:
1. An organic light emitting device, comprising: an anode; a cathode; and a phosphorescent emissive region disposed between the anode and the cathode, wherein the emissive region comprises an emissive material having the formula I: wherein: at least one of X M is a second or third row transition metal; the dotted lines represent optional double bonds; L is an ancillary ligand; X X X each Q is independently selected from a chemical bond and —C(R′) Y Y R a is 1 or 2; R c is 1 or 2; alternatively, R Z Z R b is 1 or 2; R d is 1 or 2; alternatively, R R additionally or alternatively R additionally or alternatively R each R′ is independently selected from H, alkyl, alkenyl, alkynyl, aralkyl, aryl and heteroaryl; n is 1 or 2; and m is 0 to 3, wherein when n is 1, m is 1 to 3, and when n is 2, m is 0.