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公开(公告)号：US20240357852A1
公开(公告)日：2024-10-24
申请号：US18587624
申请日：2024-02-26
发明人： SUNG-SOO BAE , TSUYOSHI NAIJO , SANG GYUN KIM , HOJUNG SYN , HYOSUP SHIN , JIYOUNG LEE , CHANGWOONG CHU
CPC分类号： H10K50/171 , C09K11/06 , H10K50/18 , H10K59/353 , H10K85/342 , H10K85/346 , H10K85/626 , H10K85/631 , H10K85/654 , H10K85/6572 , H10K2102/351
摘要： 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.
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公开(公告)号：US20240341184A1
公开(公告)日：2024-10-10
申请号：US18436263
申请日：2024-02-08
发明人： JIYOUNG LEE , TSUYOSHI NAIJO , YUNJEE PARK , SUNG-SOO BAE , HOJUNG SYN , HYOSUP SHIN , CHANGWOONG CHU
CPC分类号： H10K85/658 , C09K11/06 , H10K85/346 , H10K85/40 , H10K85/6572 , C09K2211/1018 , C09K2211/1044 , C09K2211/185 , H10K50/121 , H10K50/13 , H10K85/654
摘要： 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.
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公开(公告)号：US20230413592A1
公开(公告)日：2023-12-21
申请号：US18449368
申请日：2023-08-14
发明人： SUNGWOOK KIM , Kyungsik KIM , SeulOng KIM , TSUYOSHI NAIJO , SUNG-SOO BAE , Dongchan LEE , HYEIN JEONG , Hyewon CHOI , Seung-Jin CHU , Jaeweon HUR
摘要： 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.
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公开(公告)号：US20230138754A1
公开(公告)日：2023-05-04
申请号：US17857616
申请日：2022-07-05
发明人： JIYOUNG LEE , TSUYOSHI NAIJO , JANG YEOL BAEK , HYOSUP SHIN
摘要： A light emitting element includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer includes a hole transporting host, an electron transporting host, a phosphorescent sensitizer, and a fluorescent dopant, wherein the fluorescent dopant emits light having a full width at half maximum (FWHM) equal to or less than about 20 nm. The fluorescent dopant may include a compound represented by Formula 1. Accordingly, the light emitting element according to an embodiment may exhibit enhanced color purity and long service life characteristics.
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公开(公告)号：US20240215286A1
公开(公告)日：2024-06-27
申请号：US18518166
申请日：2023-11-22
发明人： HYOSUP SHIN , TSUYOSHI NAIJO , YUNJEE PARK , SUNG-SOO BAE , HOJUNG SYN , JIYOUNG LEE , CHANGWOONG CHU
IPC分类号： H10K50/12
CPC分类号： H10K50/121 , H10K2101/90
摘要： 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.
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公开(公告)号：US20230127039A1
公开(公告)日：2023-04-27
申请号：US17889217
申请日：2022-08-16
发明人： TSUYOSHI NAIJO , HYOSUP SHIN , JIYOUNG LEE
摘要： A light emitting element includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer may include a hole transporting host, an electron transporting host, a phosphorescent sensitizer, and a delayed fluorescent dopant. The delayed fluorescent dopant may have a greater absolute value of the HOMO energy level than the hole transporting host. Accordingly, the light emitting element including the delayed fluorescent dopant in an embodiment may exhibit long lifespan.
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公开(公告)号：US20220328766A1
公开(公告)日：2022-10-13
申请号：US17683546
申请日：2022-03-01
发明人： HYOSUP SHIN , JIYOUNG LEE , HYUNYOUNG KIM , TSUYOSHI NAIJO
IPC分类号： H01L51/00
摘要： Provided is a light emitting diode including a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode and including a polycyclic compound represented by Formula 1, thereby exhibiting high luminous efficiency and improved lifespan characteristics.
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