Patent ID: 6727008
Filing Date: 2004-04-27
Classification: H01L,Y10S

Abstract:
An OLED comprisinga cathode comprising a first conducting layer; an electroluminescent layer comprising a compound having the formula wherein X is independently in each occurrence â€”Oâ€”, â€”Sâ€”, or N(R5), wherein R5 is a C1-20 hydrocarbyl (which correspond to the heterocyclic group being a 1,3,4 oxadiazole, 1,3,4-thiadiazole or 1,2,4,-triazole, respectively); R1 is independently in each occurrence C1-20 alkyl, alkoxy, aryl, aryloxy, or a tertiary amine group â€”N(R4)2, wherein R4 is a C1-20 hydrocarbyl group which is optionally substituted with C1-20 alkoxy groups; R2 is independently in each occurrence H or a C1-20 hydrocarbyl group optionally containing one or more â€”Oâ€”, Sâ€”, or â€”N(R6)â€” groups, wherein R6 is H or C1-10 hydrocarbyl; R3 is independently in each occurrence a C1-20 hydrocarbyl group, optionally containing one or more â€”Oâ€”, Sâ€”, or â€”N(R6)â€” groups; and Ar1 is independently in each occurrence a divalent C5-10 aromatic group; and an anode comprising a second conducting layer, wherein said anode is transparent to light generated by said electroluminescent layer.