公开(公告)号：US20240365577A1

公开(公告)日：2024-10-31

申请号：US18534508

申请日：2023-12-08

Applicant: Samsung Display Co., Ltd.

Inventor： HOJUNG SYN ,  SUNG-SOO BAE ,  CHANGWOONG CHU

IPC: H10K50/13 ,  H10K59/35 ,  H10K85/60 ,  H10K102/00

CPC classification number: H10K50/13 ,  H10K59/35 ,  H10K85/626 ,  H10K85/633 ,  H10K85/657 ,  H10K85/6572 ,  H10K85/658 ,  H10K2102/351

Abstract: Light emitting element includes a first electrode, a hole transport region, a light emitting layer, an electron transport region, and a second electrode that are sequentially stacked. The light emitting layer includes a first sub light emitting layer adjacent the first electrode, a second sub light emitting layer on the first sub light emitting layer, and a light emitting auxiliary layer between the first sub light emitting layer and the second sub light emitting layer and including a plurality of auxiliary compounds. The light emitting auxiliary layer includes a first state in which an average separation distance between the auxiliary compounds is a first distance, and a second state in which an average separation distance between the auxiliary compounds is a second distance smaller than the first distance. An external quantum efficiency is larger when the light emitting auxiliary layer is in the second state than in the first state.

公开(公告)号：US20220123246A1

公开(公告)日：2022-04-21

申请号：US17358660

申请日：2021-06-25

Applicant: Samsung Display Co., Ltd.

Inventor： HOJUNG SYN

IPC: H01L51/50 ,  H01L51/00 ,  C09K11/06

Abstract: An organic electroluminescence device according to an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an exciton diffusion layer disposed on the hole transport region and including a first host represented by Formula 1, an emission layer disposed on the exciton diffusion layer and including a second host, a third host, and a phosphorescent dopant, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The organic electroluminescence device exhibits high efficiency and a long service life.

公开(公告)号：US20240215286A1

公开(公告)日：2024-06-27

申请号：US18518166

申请日：2023-11-22

Applicant: Samsung Display Co., LTD.

Inventor： HYOSUP SHIN ,  TSUYOSHI NAIJO ,  YUNJEE PARK ,  SUNG-SOO BAE ,  HOJUNG SYN ,  JIYOUNG LEE ,  CHANGWOONG CHU

IPC: H10K50/12

CPC classification number: H10K50/121 ,  H10K2101/90

Abstract: A light emitting device of an embodiment includes a first light emitting unit including a first emission layer, and a second light emitting unit including a second emission layer. The first emission layer includes a first host, a phosphorescence sensitizer, a first fluorescence dopant, the second emission layer includes a second host which is different from the first host, and a second fluorescence dopant, the first fluorescence dopant has a highest occupied molecular orbital (HOMO) energy level of about −5.2 eV or less, and the second fluorescence dopant has a HOMO energy level of about −5.2 eV or more.

公开(公告)号：US20240357852A1

公开(公告)日：2024-10-24

申请号：US18587624

申请日：2024-02-26

Applicant: Samsung Display Co., Ltd.

Inventor： SUNG-SOO BAE ,  TSUYOSHI NAIJO ,  SANG GYUN KIM ,  HOJUNG SYN ,  HYOSUP SHIN ,  JIYOUNG LEE ,  CHANGWOONG CHU

IPC: H10K50/17 ,  C09K11/06 ,  H10K50/18 ,  H10K59/35 ,  H10K85/30 ,  H10K85/60 ,  H10K102/00

CPC classification number: H10K50/171 ,  C09K11/06 ,  H10K50/18 ,  H10K59/353 ,  H10K85/342 ,  H10K85/346 ,  H10K85/626 ,  H10K85/631 ,  H10K85/654 ,  H10K85/6572 ,  H10K2102/351

Abstract: A light emitting element includes a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, an electron transport region on the emission layer, and a second electrode on the electron transport region. The electron transport region includes an electron transport layer on the emission layer, a first electron injection layer on the electron transport layer, and a second electron injection layer on the first electron injection layer, the thicknesses of the first and second electron injection layers are each about 1 nm to about 5 nm, the first electron injection layer includes a phenanthroline derivative and/or a phosphine oxide derivative, and the second electron injection layer includes a metal material.

公开(公告)号：US20240341184A1

公开(公告)日：2024-10-10

申请号：US18436263

申请日：2024-02-08

Applicant: Samsung Display Co., Ltd.

Inventor： JIYOUNG LEE ,  TSUYOSHI NAIJO ,  YUNJEE PARK ,  SUNG-SOO BAE ,  HOJUNG SYN ,  HYOSUP SHIN ,  CHANGWOONG CHU

IPC: H10K85/60 ,  C09K11/06 ,  H10K50/12 ,  H10K50/13 ,  H10K85/30 ,  H10K85/40

CPC classification number: H10K85/658 ,  C09K11/06 ,  H10K85/346 ,  H10K85/40 ,  H10K85/6572 ,  C09K2211/1018 ,  C09K2211/1044 ,  C09K2211/185 ,  H10K50/121 ,  H10K50/13 ,  H10K85/654

Abstract: Embodiments provide a light emitting element and a display device including the same. The light emitting element includes a first electrode, a second electrode, and a plurality of emission layers disposed between the first electrode and the second electrode, wherein at least one of the plurality of emission layers include a hole transporting host, an electron transporting host, a phosphorescent sensitizer, and a first fluorescent dopant. The first fluorescent dopant comprises a pentacyclic fused ring core that includes one boron atom and two heteroatoms as ring-forming atoms, and at least one amine substituent of the fused ring core; the at least one amine substituent is substituted with at least one substituted or unsubstituted pyrenyl group; and a difference between a triplet state energy level of the first fluorescent dopant and a singlet state energy level of the first fluorescent dopant is equal to or greater than about 0.4 eV.