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：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.