公开(公告)号：US20220037606A1

公开(公告)日：2022-02-03

申请号：US17159878

申请日：2021-01-27

Applicant: Samsung Display Co., Ltd.

Inventor： Hojung SYN

IPC: H01L51/50 ,  H01L51/52

Abstract: A light emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer disposed between the first electrode and the second electrode and including a stack of emission layers. The stack of emission layers includes two or more emission layers, a quantum well layer, a hole transport host, and an electron transport host. The quantum well layer includes a hole transport compound, and an absolute value of highest occupied molecular orbital (HOMO) energy of the hole transport compound is greater than an absolute value of HOMO energy of the hole transport host.

公开(公告)号：US20210184151A1

公开(公告)日：2021-06-17

申请号：US17030365

申请日：2020-09-23

Applicant: Samsung Display Co, Ltd.

Inventor： Hangeul LEE ,  Heejoo KO ,  Minkyung KIM ,  Hojung SYN

IPC: H01L51/50 ,  H01L51/00

Abstract: An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein, the organic layer further includes an emission region, and a first region disposed between the first electrode and the emission region, and a second region disposed between the emission region and the second electrode, the second region includes a first layer and a second layer, each including an organic compound, the emission region includes a first compound, a second compound, a third compound, and a fourth compound, the first compound includes a hole transporting host compound, the second compound includes an electron transporting host compound or a bipolar host compound, the third compound includes a thermally active delayed fluorescence compound or an organometallic complex, satisfying Equation 1 as described herein.

公开(公告)号：US20230225148A1

公开(公告)日：2023-07-13

申请号：US17964436

申请日：2022-10-12

Applicant: Samsung Display Co., Ltd.

Inventor： Hojung SYN ,  Jinwon SUN ,  Changwoong CHU

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

CPC classification number: H01L51/5056 ,  H01L51/5096 ,  H01L51/5072 ,  H01L27/3244 ,  H01L51/0085 ,  H01L51/0087 ,  H01L51/0072 ,  H01L51/006 ,  H01L51/0073 ,  H01L51/0067 ,  H01L51/0061 ,  H01L51/0059 ,  H01L51/0074 ,  H01L51/0064 ,  H01L51/0052 ,  H01L51/0054 ,  H01L51/0055 ,  H01L51/0071

Abstract: Provided are a light-emitting device and an electronic apparatus including the same. The light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode. The interlayer includes an emission layer, and a hole transport region between the first electrode and the emission layer. The emission layer includes a transition metal-containing organometallic compound. The hole transport region includes an electron-blocking layer. The electron-blocking layer includes a first electron-blocking material and a second electron-blocking material, and the first electron-blocking material and the second electron-blocking material have different hole mobilities.