Organic light emitting device

摘要

An organic light emitting device including a plurality of organic layers between a first electrode and an emitting layer, wherein the organic layer includes an electron blocking layer. In one embodiment, a first organic layer, an electron blocking layer, a second organic layer and an emitting layer are formed on the first electrode. The electron blocking layer has a Lowest Unoccupied Molecular Orbital (LUMO) level which is lower than that of the first organic layer. Thus, the electron blocking layer traps excess electrons injected from the emitting layer, thereby improving lifetime characteristics of the OLED.

主权项

1. An organic light emitting device (OLED) comprising:
a first electrode; a second electrode; an emitting layer between the first electrode and the second electrode; an organic layer between the emitting layer and the first electrode; and an electron blocking layer between the emitting layer and a portion of the organic layer and having a lowest unoccupied molecular orbital (LUMO) level lower than that of the organic layer, wherein the organic layer comprises a hole transport layer between the electron blocking layer and the emitting layer, the LUMO level of the electron blocking layer is lower than that of the hole transport layer, and the hole transport layer is in direct contact with the emitting layer.