公开(公告)号：US20230413592A1

公开(公告)日：2023-12-21

申请号：US18449368

申请日：2023-08-14

Applicant: Samsung Display Co., LTD.

Inventor： SUNGWOOK KIM ,  Kyungsik KIM ,  SeulOng KIM ,  TSUYOSHI NAIJO ,  SUNG-SOO BAE ,  Dongchan LEE ,  HYEIN JEONG ,  Hyewon CHOI ,  Seung-Jin CHU ,  Jaeweon HUR

IPC: H10K50/12 ,  H10K50/15 ,  H10K50/16

CPC classification number: H10K50/12 ,  H10K50/16 ,  H10K50/15

Abstract: A light emitting element includes: a first electrode, a second electrode facing the first electrode, a first light emitting layer between the first electrode and the second electrode to emit a first light, a second light emitting layer between the first light emitting layer and the second electrode to emit a second light, and an intermediate layer including a host material between the first light emitting layer and the second light emitting layer and, wherein the intermediate layer has a thickness of from about 90 nm to 170 nm.

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.

公开(公告)号：US20250063884A1

公开(公告)日：2025-02-20

申请号：US18939409

申请日：2024-11-06

Applicant: Samsung Display Co., LTD.

Inventor： SUNGWOOK KIM ,  Kyungsik KIM ,  SeulOng KIM ,  TSUYOSHI NAIJO ,  SUNG-SOO BAE ,  Dongchan LEE ,  HYEIN JEONG ,  Hyewon CHOI ,  Seung-Jin CHU ,  Jaeweon HUR

IPC: H10K50/12 ,  H10K50/15 ,  H10K50/16

Abstract: A light emitting element includes: a first electrode, a second electrode facing the first electrode, a first light emitting layer between the first electrode and the second electrode to emit a first light, a second light emitting layer between the first light emitting layer and the second electrode to emit a second light, and an intermediate layer including a host material between the first light emitting layer and the second light emitting layer and, wherein the intermediate layer has a thickness of from about 90 nm to 170 nm.

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.