公开(公告)号：US20170141340A1

公开(公告)日：2017-05-18

申请号：US15343625

申请日：2016-11-04

Applicant: Japan Display Inc.

Inventor： Masaki TANAKA ,  Toshihiro Sato

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/52

CPC classification number: H01L51/5028 ,  G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0809 ,  G09G2310/0278 ,  H01L27/3211 ,  H01L27/3262 ,  H01L51/005 ,  H01L51/0052 ,  H01L51/0055 ,  H01L51/0056 ,  H01L51/006 ,  H01L51/0067 ,  H01L51/0071 ,  H01L51/0072 ,  H01L51/0073 ,  H01L51/5016 ,  H01L51/5203

Abstract: In an organic EL device, the light emission efficiency by a TADF mechanism is to be improved with an emissive layer structure that can be easily formed. An OLED has at least an emissive layer between an upper electrode and a lower electrode. The emissive layer includes: a host layer including a host material; an assistant dopant layer which is a layer adjacent to the host layer and where an assistant dopant made of a thermally activated delayed fluorescence material and the host material are intermingled within a plane; and a light-emitting dopant layer which is a layer adjacent to the assistant dopant layer and where a light-emitting dopant made of a fluorescent material emitting light by being excited by the assistant dopant and the host material are intermingled within a plane.

公开(公告)号：US20170330920A1

公开(公告)日：2017-11-16

申请号：US15492093

申请日：2017-04-20

Applicant: Japan Display Inc.

Inventor： Masaki TANAKA ,  Hajime AKIMOTO

IPC: H01L27/32 ,  H01L51/52

CPC classification number: H01L27/3246 ,  H01L27/288 ,  H01L27/323 ,  H01L51/5203

Abstract: A display device includes a plurality of pixel electrodes including a first pixel electrode, a first electrode adjacent to the first pixel electrode and arranged separated from the first pixel electrode, a bank covering an edge part of the first pixel electrode, an end part of the first electrode, and a region between the first pixel electrode and the first electrode, a first organic layer arranged above the first pixel electrode, above the first electrode and above the bank, a second organic layer arranged above the first organic layer overlapping the first pixel electrode, a third organic layer arranged above the second organic layer, above the first organic layer overlapping the first electrode, and above the first organic layer overlapping the bank, an opposing electrode arranged above the third organic layer overlapping the first pixel electrode, and a second electrode arranged above the third organic layer overlapping the first electrode.