Patent ID: 8912531
Filing Date: 2014-12-16
Classification: H01L

Abstract:
1. An organic electroluminescent device comprising an emitting layer, an electron-injecting controlling layer and an electron-transporting layer between an anode and a cathode in sequential order from the anode, bonding one to another, the emitting layer comprising a host material and a dopant, the ionization potential (Ips) of a main material forming the electron-injecting controlling layer and the ionization potential (Iph) of the host material of the emitting layer satisfying the following relationship (i), an electron mobility of an electron-transporting material forming the electron-transporting layer being 10 an affinity (Af1) of the host material of the emitting layer, an affinity (Af2) of the main material forming the electron-injecting controlling layer, and an affinity (Af3) of the electron-transporting material forming the electron-transporting layer satisfying the following relationships (ii) and (iii)