公开(公告)号：US10854680B2

公开(公告)日：2020-12-01

申请号：US16027181

申请日：2018-07-03

Applicant: JOLED INC.

Inventor： Kazuhiro Yokota

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

Abstract: An organic electroluminescent element includes, in order, an anode, an organic layer including a light-emitting layer, and a cathode. The organic layer further includes a first organic layer that is provided between the light-emitting layer and the anode, and includes a hole transport layer. The hole transport layer includes a material having an absorption coefficient of 0.01 or greater and 0.06 or less. The light-emitting layer has a light-emitting center receding from a first interface of the light-emitting layer by a thickness greater than 0 and equal to or less than 0.4, where the light-emitting layer has a thickness of 1. The first interface is adjacent to the anode. The organic electroluminescent element further includes a microcavity structure in which the position of the interface is a resonance point.

公开(公告)号：US10026795B2

公开(公告)日：2018-07-17

申请号：US15312183

申请日：2015-05-20

Applicant: JOLED INC.

Inventor： Yuuki Abe ,  Kazuhiro Yokota ,  Yasuharu Shinokawa ,  Kou Sugano ,  Eiji Takeda

IPC: H01L29/08 ,  H01L51/00 ,  H01L27/32 ,  H01L51/52 ,  H01L27/12 ,  H01L29/786

Abstract: An organic EL element including: a TFT substrate having a TAOS-TFT; and an organic EL unit having a lower electrode. The lower electrode includes an aluminum containing metal layer, a transition metal containing oxide layer disposed between the aluminum containing metal layer and the TFT substrate, and an aluminum containing oxide layer disposed between the aluminum containing metal layer and the transition metal containing oxide layer and in contact with both the aluminum containing metal layer and the transition metal containing oxide layer. The aluminum containing oxide layer contains aluminum oxide. The transition metal containing oxide layer contains tungsten oxide and has a density of 6.5 g/cm3 or more.

公开(公告)号：US09825250B2

公开(公告)日：2017-11-21

申请号：US14897021

申请日：2014-06-30

Applicant: JOLED INC.

Inventor： Kazuhiro Yokota ,  Yuuki Abe ,  Yasuharu Shinokawa ,  Kosuke Mishima

IPC: H01L51/52 ,  H01L51/50 ,  H01L51/56

CPC classification number: H01L51/5218 ,  H01L27/3244 ,  H01L51/5088 ,  H01L51/5096 ,  H01L51/5215 ,  H01L51/56 ,  H01L2251/308 ,  H01L2251/5315 ,  H01L2251/558

Abstract: An organic EL element includes: a first electrode that is a metal layer; a transparent conductive layer containing indium zinc oxide; and a light-emitting layer, wherein the first electrode, the transparent conductive layer, and the light-emitting layer are stacked, and a ratio of zinc to indium in a vicinity of an interface of the transparent conductive layer is lower than or equal to 0.25, the interface being closer to the light-emitting layer.

公开(公告)号：US09991323B2

公开(公告)日：2018-06-05

申请号：US15150065

申请日：2016-05-09

Applicant: JOLED INC. ,  Japan Display Inc.

Inventor： Kazuhiro Yokota ,  Masaki Nishimura ,  Hiroyuki Ajiki

IPC: H01L29/08 ,  H01L21/00 ,  H01L27/32 ,  H01L51/50 ,  H01L51/52

CPC classification number: H01L27/3246 ,  H01L27/3211 ,  H01L27/323 ,  H01L51/5012 ,  H01L51/5016 ,  H01L51/5036 ,  H01L51/5265 ,  H01L2251/55 ,  H01L2251/558

Abstract: An organic electroluminescence (EL) element emitting blue light from a light emitting surface and including: a first electrode; an organic light-emitting layer disposed on the first electrode and/or closer to the light emitting surface than the first electrode; and a second electrode disposed on the organic light-emitting layer and/or closer to the light emitting surface than the organic light-emitting layer. In the organic EL element emitting blue light, the organic light-emitting layer contains an organic light-emitting material emitting, through photoluminescence, blue light that has a CIE y coordinate no greater than 0.13 such that a luminance drop due to film shape is suppressed to 10% or smaller.

公开(公告)号：US11245085B2

公开(公告)日：2022-02-08

申请号：US16817614

申请日：2020-03-13

Applicant: JOLED Inc.

Inventor： Hiroki Tsujimura ,  Kazuhiro Yokota ,  Hideyuki Shirahase ,  Kazuhiro Yoneda

IPC: H01L51/50 ,  H01L51/56

Abstract: Disclosed is a self light-emitting element including a first electrode, a light-emitting layer disposed above the first electrode, a function layer disposed above the light-emitting layer, and doped with a metal, and a second electrode disposed above the function layer, in which the function layer has a multilayer structure of at least three layers including an uppermost layer, a lowermost layer, and an intermediate layer between the uppermost layer and the lowermost layer, and the intermediate layer is doped with the metal at a lower concentration than the uppermost layer and the lowermost layer.