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：US20230084087A1

公开(公告)日：2023-03-16

申请号：US17745604

申请日：2022-05-16

Applicant: Samsung Display Co., Ltd.

Inventor： JUNGHO CHOI ,  PILGU KANG ,  SEULONG KIM ,  HAJIN SONG ,  DONGSEOB JEONG ,  YANG-JIN CHO

IPC: H01L51/50 ,  H01L27/32

Abstract: Provided is a light emitting device including a first electrode, a hole transport region on the first electrode, a first light emitting layer on the hole transport region and emitting light of a first wavelength, a second light emitting layer on the hole transport region and emitting light of a second wavelength different from the first wavelength, an electron transport region on the first light emitting layer and the second light emitting layer, and a second electrode on the electron transport region. The second light emitting layer includes a first sub-light emitting layer including a first host having a first hole transporting host and a first electron transporting host and a dopant emitting light of the second wavelength, and a second sub-light emitting layer including a second host and a second hole transporting host, but not including the dopant. The light emitting device provides improved light emitting 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.