Patent ID: 9608210
Date: 2017-03-28
CPC Classifications: C09B,C09K,H01L,H05B

Claim:
1. An organic electroluminescent device, comprising: a first electrode; a second electrode facing the first electrode; a first charge carrying layer disposed between the first electrode and the second electrode, the first charge carrying layer being disposed adjacent to the first electrode; and a second charge carrying layer disposed between the first electrode and the second electrode, the second charge carrying layer disposed adjacent to the second electrode, wherein the first charge carrying layer includes an emitting sub-layer, a hole injection sub-layer and a hole transporting sub-layer between the hole injection sub-layer and the emitting sub-layer, wherein the hole injection sub-layer includes a host material selected from the group consisting of:  and wherein the hole injection sub-layer further includes a first dopant material having a lowest unoccupied molecular orbital (LUMO) level of −4.5 eV to −6.0 eV.