Patent ID: 8541111
Filing Date: 2013-09-24
Classification: H01L

Abstract:
1. A red light-emitting organic electroluminescent device comprising: an anode; a cathode; an organic layer which includes a light-emitting layer and is interposed between the anode and cathode, the light-emitting layer including a red light-emitting guest material and a host material composed of a polycyclic aromatic hydrocarbon compound with a mother skeleton having a ring member number of from four to seven; and an electron transport layer including a benzimidazole derivative represented by the following general formula (1) provided adjacent to the light-emitting layer wherein A A B represents a substituted or unsubstituted arylene group having not more than sixty carbon atoms, a pyridinylene group which may have a substituted or unsubstituted group, a quinolinylene group which may have a substituent or a fluorenylene group which may have a substituent; and Ar represents a substituted or unsubstituted alkyl group having from one to twenty carbon atoms or a substituted or unsubstituted alkoxy group having from one to twenty carbon atoms.