Patent ID: 9564598
Date: 2017-02-07
CPC Classifications: H01L

Claim:
1. An organic light-emitting device comprising an anode; a cathode; and an organic layer between the anode and the cathode and comprising an emission layer (EML), a hole transport region between the anode and the EML and comprising at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer (EBL), and an electron transport region between the EML and the cathode and comprising an electron transport layer (ETL) and at least one selected from a hole blocking layer (HBL) and an electron injection layer (EIL), wherein a mixed organic layer is between the EML and the electron transport layer (ETL) and comprises at least two different compounds, a triplet energy of at least one compound of the at least two different compounds being 2.2 eV or greater, wherein the mixed organic layer is in contact with the EML and the ETL, and wherein the at least one compound is an electron-transporting material or a hole-transporting material.