公开(公告)号：US10297776B2

公开(公告)日：2019-05-21

申请号：US15204288

申请日：2016-07-07

Applicant: JOLED INC.

Inventor： Kosuke Mishima ,  Yoshiyuki Ota ,  Junko Tanaka ,  Takahiro Komatsu ,  Hiroshi Katagiri

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

Abstract: An organic electroluminescence (EL) element including an anode, a cathode opposing the anode, a light-emitting layer between the anode and the cathode, a hole transport layer in contact with the light-emitting layer, between the light-emitting layer and the anode, and an electron transport layer in contact with the light-emitting layer, between the light-emitting layer and the cathode. A difference between a lowest unoccupied molecular orbital (LUMO) level of an organic material included in the light-emitting layer and a LUMO level of an organic material included in the electron transport layer is greater than a difference between a highest occupied molecular orbital (HOMO) level of an organic material included in the hole transport layer and a HOMO level of the organic material included in the light-emitting layer.