Patent ID: 8525160
Filing Date: 2013-09-03
Classification: H01L

Abstract:
1. An organic light-emitting device, comprising: a substrate; a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode; a first electron transport layer between the second electrode and the emission layer, the first electron transport layer including a first electron transporting material; a second electron transport layer between the second electrode and the first electron transport layer, the second electron transport layer including a second electron transporting material; a third electron transport layer between the second electrode and the second electron transport layer, the third electron transport layer including a third electron transporting material and a fourth electron transporting material; and a hole transport layer between the first electrode and the emission layer, wherein: the first electron transporting material has an electron mobility smaller than an electron mobility of the second electron transporting material at an electric field of 800 to 1000 V/cm, the second electron transporting material and the third electron transporting material each independently have an electron mobility of about 10 the third electron transport layer has an electron injection barrier of about 0.2 eV or less at an interface between the third electron transport layer and the second electrode.