HIGHLY EFFICIENT ORGANIC LIGHT-EMITTING DIODES HAVING HEAVILY-DOPED DOPANTS

摘要

The present invention relates to a kind of Organic Light Emitting Diodes, comprising: anode; Hole injection layer (HIL) is formed in anode; Hole transporting layer (HTL) is formed in hole injection layer; Fluorescent dopants and 96-98 weight being formed in emission layer (EML) transport layer and containing 2-4 weight ratios) host; A kind of exciton blocking layer (EBL) is formed in luminescent layer; Electron transport layer (ETL) is formed in exciton blocking layer; The cathode electronics transport layer of upper formation, wherein hole transporting layer of the dopant level of highest occupied molecular orbital (HOMO) higher than HOMO grades is lower than HOMO grades of host, and the LUMO level for being higher than the electron transfer layer with the level of lowest unoccupied molecular orbital (LUMO) is lower than the host of the LUMO grades of transport layer. ;The 2016 of copyright KIPO submissions