Patent ID: 8012602

Claim:
An electroluminescent device comprising: a) an anode b) a hole injecting layer and/or hole transporting layer c) a light emitting layer d) an electron transporting layer and e) a cathode, wherein c) comprises an organic compound of formula I wherein V is H, X is C 1 -C 18 alkyl or W is and Y is wherein one of the groups W 1 to W 5 or Y 1 to Y 5 is naphthyl or pyridyl, or naphthyl or pyridyl substituted by —OR 5 , halogen, —NR 5 R 6 , C 1 -C 18 alkyl, C 1 -C 18 alkyl substituted by halogen or C 1 -C 18 alkyl interrupted by —O—; and the remaining groups W 1 to W 5 and Y 1 to Y 5 and the groups X 1 to X 5 are independently of each other H, phenyl, biphenyl, naphthyl or pyridyl, or phenyl, biphenyl, naphthyl or pyridyl substituted by —OR 5 , —NR 5 R 6 , halogen, C 1 -C 18 alkyl, C 1 -C 18 alkyl substituted by halogen or C 1 -C 18 alkyl interrupted by —O—; wherein R 5 and R 6 are independently of each other H, C 6 -C 18 aryl, C 6 -C 18 aryl which is substituted by C 1 -C 18 alkyl, C 1 -C 18 alkyl or C 1 -C 18 alkyl which is interrupted by —O—; or R 5 and R 6 together form a five or six membered ring.