公开(公告)号：US11700734B2

公开(公告)日：2023-07-11

申请号：US16953370

申请日：2020-11-20

Applicant: JOLED Inc.

Inventor： Toshiyuki Akiyama ,  Yasuhiro Sekimoto ,  Muneharu Sato ,  Shinichiro Ishino ,  Tomohiko Oda ,  Mineki Hasegawa

IPC: H10K50/11 ,  H10K71/00 ,  H10K101/40 ,  H10K50/16 ,  H10K59/35 ,  H10K101/30

CPC classification number: H10K50/11 ,  H10K71/00 ,  H10K50/166 ,  H10K59/35 ,  H10K2101/30 ,  H10K2101/40

Abstract: An organic electroluminescence element including an anode, a light-emitting layer, a functional layer, and a cathode stacked in this order. The light-emitting layer and the functional layer are in contact with each other. Hole mobility of the light-emitting layer is greater than electron mobility of the light-emitting layer. The electron mobility of the light-emitting layer is equal to or greater than an effective electron mobility of the functional layer. A highest occupied molecular orbital (HOMO) level of a first functional material included in the light-emitting layer is at least 0.4 eV greater than a HOMO level of a second functional material included in the functional layer.

公开(公告)号：US09698382B2

公开(公告)日：2017-07-04

申请号：US14908337

申请日：2014-07-23

Applicant: JOLED INC.

Inventor： Keiko Kurata ,  Muneharu Sato ,  Tetsuro Kondoh ,  Shinichiro Ishino

IPC: H01L27/15 ,  H01L31/12 ,  H01L33/00 ,  H01L51/52 ,  H01L27/32

CPC classification number: H01L51/5271 ,  H01L27/3211 ,  H01L51/5234 ,  H01L51/5265 ,  H01L51/5275

Abstract: Each of blue light emitting elements includes: a photoanode; a translucent cathode; an organic light emitting layer between the photoanode and the translucent cathode; a first functional layer between the organic light emitting layer and the photoanode; and a second functional layer between the organic light emitting layer and the translucent cathode, and has a resonator structure. The first functional layer has an optical film thickness of 48-62 nm. The translucent cathode is a stack of a first translucent conductive layer, a metal layer, and a second translucent conductive layer stacked in this order from the second functional layer side. The first translucent conductive layer has a refractivity of 2.0-2.4, and a film thickness of 85-97 nm. The metal layer has a refractivity different by 0 to 2.0 from that of the first translucent conductive layer, and has a film thickness of 2-22 nm.

公开(公告)号：US11758749B2

公开(公告)日：2023-09-12

申请号：US17372520

申请日：2021-07-12

Applicant: JOLED Inc.

Inventor： Kosuke Mishima ,  Koyo Sakamoto ,  Muneharu Sato

IPC: H10K50/17 ,  H10K50/818 ,  H10K50/828 ,  H10K59/35 ,  H10K71/00 ,  H10K102/00

CPC classification number: H10K50/171 ,  H10K50/818 ,  H10K50/828 ,  H10K59/35 ,  H10K71/00 ,  H10K2102/351

Abstract: An organic electroluminescence element includes an anode, an organic light emitting layer disposed on an upper side of the anode, a first functional layer disposed over the organic light emitting layer and including NaF, a second functional layer disposed over the first functional layer and including an organic material containing Yb, and a cathode disposed on an upper side of the second functional layer. A method of manufacturing an organic electroluminescence element, includes forming an anode, forming an organic light emitting layer on an upper side of the anode, forming a first functional layer including NaF over the organic light emitting layer, forming a second functional layer including an organic material containing Yb over the first functional layer, and forming a cathode on an upper side of the second functional layer.

公开(公告)号：US20220199930A1

公开(公告)日：2022-06-23

申请号：US17557072

申请日：2021-12-21

Applicant: JOLED Inc.

Inventor： Yasuhiro Sekimoto ,  Shinichiro Ishino ,  Toshiyuki Akiyama ,  Tomohiko Oda ,  Muneharu Sato

IPC: H01L51/50 ,  H01L51/56

Abstract: An organic EL element including an anode, a cathode, and a light emitting layer between the anode and the cathode. The light emitting layer includes a fluorescent material and a host material. A difference between a lowest unoccupied molecular orbital (LUMO) level of the fluorescent material and a highest occupied molecular orbital (HOMO) level of the fluorescent material is less than or equal to a difference between a LUMO level and a HOMO level of the host material. The LUMO level of the fluorescent material is equal to or higher than the LUMO level of the host material. The HOMO level of the fluorescent material is equal to or higher than the HOMO level of the host material, and a difference in energy level between the HOMO level of the fluorescent material and the HOMO level of the host material is 0.3 eV or less.