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.