公开(公告)号：US20250072203A1

公开(公告)日：2025-02-27

申请号：US18616884

申请日：2024-03-26

Applicant: Samsung Display Co., Ltd.

Inventor： JONGWON LEE ,  PILGU KANG ,  SEUNG CHEOL KIM ,  CHANG-MIN LEE ,  HAKCHOONG LEE ,  WONSUK HAN ,  JAEHOON HWANG

IPC: H10K50/13 ,  H10K59/38

Abstract: A light emitting element includes a first electrode, a first light emitting stack disposed on the first electrode, a second light emitting stack disposed on the first light emitting stack, a third light emitting stack disposed on the second light emitting stack, a fourth light emitting stack disposed on the third light emitting stack, a fifth light emitting stack disposed on the fourth light emitting stack, a second electrode disposed on the fifth light emitting stack, and charge generation layers disposed between adjacent ones of the first light emitting stack to the fifth light emitting stack. Each of the first light emitting stack to the fifth light emitting stack includes at least one emission layer, and the first light emitting stack to the fifth light emitting stack include at least two blue emission layers, at least one green emission layer, and at least one red emission layer.

公开(公告)号：US20250072202A1

公开(公告)日：2025-02-27

申请号：US18630147

申请日：2024-04-09

Applicant: Samsung Display Co., Ltd.

Inventor： JONGWON LEE ,  SEUNG CHEOL KIM ,  CHANG-MIN LEE ,  HAKCHOONG LEE ,  JAEHOON HWANG

IPC: H10K50/13 ,  H10K50/115 ,  H10K50/12 ,  H10K50/15 ,  H10K50/16 ,  H10K59/35

Abstract: A light emitting element includes a first electrode, a second electrode facing the first electrode, and a plurality of light emitting structures stacked between the first electrode and the second electrode, each of the plurality of light emitting structures including a hole transport region, a light emitting layer, and an electron transport region. At least one of the light emitting structures is a green light emitting structure which emits green light, and the light emitting layer of the green light emitting structure includes a first sub-light emitting layer including a low refractive material having a refractive index value less than or equal to about 1.7 at 460 nm, and a second sub-light emitting layer not including the low refractive material, and disposed on the first sub-light emitting layer, so that the light emitting element may exhibit high light emission efficiency.

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.