Patent ID: 7659659

Claim:
An organic electroluminescent device comprising: an emitting layer between a pair of electrodes that are an anode and a cathode, and an electron injecting layer and an electron-injection-suppressing layer between the cathode and the emitting layer, the electron-injection-suppressing layer regulating the amount of electrons supplied to the emitting layer, the electron mobility of the electron-injection-suppressing layer being smaller than the electron mobility of the electron injecting layer, the electron mobility of the electron injecting layer being greater than the electron mobility of tris(8-quinolinolato)aluminum, and the electron injecting layer comprising a compound represented by the following formula: HAr-L 3 -Ar 7 —Ar 8 wherein HAr is a nitrogen-containing heterocyclic ring which has 3 to 40 carbon atoms and may have a substituent; L 3 is a single bond, an arylene group which as 6 to 60 carbon atoms and may have a substituent, a heteroarylene group which has 3 to 60 carbon atoms and may have a substituent, or a fluorenylene group which may have a substituent; Ar7 is an anthracene ring which may have a substituent; and Ar 8 is an aryl group which has 6 to 60 carbon atoms and may have a substituent or a heteroaryl group which has 3 to 60 carbon atoms and may have a substituent.