Organic Electroluminescent Device

摘要

An organic electroluminescent device having a structure in which an emitting layer ( 3 ) containing an organic metal complex having at least a heavy metal as a central metal and an electron-transporting layer ( 4 ) are stacked between an anode ( 2 ) and a cathode ( 1 ), wherein a difference (DeltaAF) in electron affinity between a main organic material forming the emitting layer ( 3 ) and a main material forming the electron-transporting layer ( 4 ) satisfies the following expression; "0.2 eV<DeltaAF<=0.65 eV".