Patent ID: 8906521

Claim:
An organic electroluminescent device comprising an anode, organic layers containing a phosphorescent light-emitting layer, and a cathode piled one upon another on a substrate wherein the organic layer of the phosphorescent light-emitting layer comprises a triptycene derivative represented by general formula (1): wherein in general formula (1), A 1 to A 5 each is independently a substituent represented by formula (2); a, b, and c each is an integer of 0-2 and 0≦a+b+c≦3; and R 1 and R 2 each is independently hydrogen, an alkyl group of 1-10 carbon atoms, an alkoxyl group of 1-6 carbon atoms, or an acyl group of 2-6 carbon atoms; wherein in formula (2), n is an integer of 0-1 and the sum of n's in general formula (1) is an integer of 1; L is a group derived from benzene, pyridine, or pyrimidine; and Ar 1 and Ar 2 each is independently an aromatic hydrocarbon group of 6-18 carbon atoms or an aromatic heterocyclic group of 3-17 carbon atoms, and Ar 1 , Ar 2 and the nitrogen atom together optionally form a nitrogen-containing heterocycle.