LG Display Co., Ltd.
Organic light-emitting diode, organic light-emitting display including the same, and method of manufacturing the same

Abstract:

An organic light-emitting diode includes: a first electrode, a light-emitting stack thereon including: a hole transport layer (HTL), a blue light-emitting layer including: a blue host material (BHM), and a blue fluorescent dopant (BFD) material, and an electron transport layer (ETL), and a second electrode on the light-emitting stack, wherein BFD LUMO>BHM, BFD HOMO>BHM, BFD singlet energy<BHM, HTL HOMO>BHM and BFD, HTL HOMO-BFD HOMO.ltoreq.0.1 eV, the HTL material LUMO>the BHM, HTL LUMO-BHM LUMO.gtoreq.0.5 eV, HTL LUMO>BFD, ETL LUMO>BHM and BFD, a difference in LUMO between the ETL material and the BFD material.ltoreq.0.1 eV, and the HTL material, the ETL material, and the BHM have the following triplet energy relationships: T.sub.1,BH<T.sub.1,HTL and T.sub.1,BH<T.sub.1,ETL, 2.8<T.sub.1,HTL<3.0, and 2.6<T.sub.1,ETL<2.8.