公开(公告)号：US20200373494A1

公开(公告)日：2020-11-26

申请号：US16877509

申请日：2020-05-19

Applicant: JOLED Inc.

Inventor： Tomohiko ODA ,  Shinichiro ISHINO ,  Toshiyuki AKIYAMA ,  Mineki HASEGAWA ,  Yasuhiro SEKIMOTO ,  Muneharu SATO

IPC: H01L51/00 ,  H01L51/56 ,  C09D11/033 ,  C09K11/02

Abstract: Disclosed is a light-emitting layer-forming ink useful in forming an organic light-emitting layer for an organic EL element by a printing process, including a tetralin-based organic solvent, and a solute including an anthracene-based, low molecular material and dissolved at a concentration of 3% or higher and 12% or lower in the tetralin-based organic solvent.

公开(公告)号：US20220158112A1

公开(公告)日：2022-05-19

申请号：US17529277

申请日：2021-11-18

Applicant: JOLED Inc.

Inventor： Toshiyuki AKIYAMA ,  Shinichiro ISHINO ,  Yasuhiro SEKIMOTO ,  Muneharu SATO ,  Takeshi KAMIYA ,  Tomohiko ODA ,  Mineki HASEGAWA ,  Masakazu TAKATA

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

Abstract: An organic EL element including an anode, a first functional layer including organic material, disposed above the anode, a second functional layer including organic material, disposed on and in contact with the first functional layer, a light emitting layer disposed on and in contact with the second functional layer, and a cathode disposed above the light emitting layer. A highest occupied molecular orbital (HOMO) level of the organic material of the second functional layer has an energy level at least 0.2 eV lower than that of a HOMO level of the organic material of the first functional layer, and film thickness of the second functional layer is 15 nm or less.

公开(公告)号：US20210167312A1

公开(公告)日：2021-06-03

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: H01L51/50 ,  H01L51/56

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.