Patent ID: 7659659
Filing Date: 2010-02-09
Classification: H01L,Y10T

Abstract:
1. 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: wherein HAr is a nitrogen-containing heterocyclic ring which has 3 to 40 carbon atoms and may have a substituent; L