公开(公告)号：US20230137462A1

公开(公告)日：2023-05-04

申请号：US17860395

申请日：2022-07-08

Applicant: Samsung Display Co., Ltd.

Inventor： YOONSEOK KA ,  DONG CHAN KIM ,  JIYOUNG MOON ,  HAKCHOONG LEE ,  HAJIN SONG ,  JIHWAN YOON ,  JAEHOON HWANG

IPC: H01L51/00 ,  H01L51/50

Abstract: A light emitting element includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region which is disposed on the emission layer and includes an electron transport layer and an electron injection layer disposed on the electron transport layer, and a second electrode disposed on the electron transport region, wherein the electron injection layer includes a host represented by Formula A or Formula B, and a metal dopant, and the metal dopant includes Ag, Bi, Mg, Li, Yb, Cu, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, or Lu, thereby improving electron injection characteristics and having excellent or suitable luminous efficiency.

公开(公告)号：US20240121975A1

公开(公告)日：2024-04-11

申请号：US18339533

申请日：2023-06-22

Applicant: Samsung Display Co., Ltd.

Inventor： JUNGHO CHOI ,  PILGU KANG ,  DONG CHAN KIM ,  JIYOUNG MOON ,  HAKCHOONG LEE

IPC: H10K50/13 ,  H10K50/15 ,  H10K59/38 ,  H10K59/80

CPC classification number: H10K50/13 ,  H10K50/156 ,  H10K59/38 ,  H10K59/80518 ,  H10K2101/30

Abstract: A light emitting device may include a first electrode, a first light emitting stack disposed on the first electrode, a charge generation layer disposed on the first light emitting stack, a second light emitting stack disposed on the charge generation layer, and a second electrode disposed on the second light emitting stack. Each of the first light emitting stack and the second light emitting stack includes a hole transport layer. A hole mobility of the charge generation layer is lower than a hole mobility of the hole transport layer.