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公开(公告)号：US20230114604A1
公开(公告)日：2023-04-13
申请号：US18065910
申请日：2022-12-14
发明人： Yong Seok HAN , Sung Woo KIM , Jin A KIM , Tae Hyung KIM , Kun Su PARK , Yuho WON , Jeong Hee LEE , Eun Joo JANG , Hyo Sook JANG
摘要： A quantum dot including a core that includes a first semiconductor nanocrystal including zinc and selenium, and optionally sulfur and/or tellurium, and a shell that includes a second semiconductor nanocrystal including zinc, and at least one of sulfur or selenium is disclosed. The quantum dot has an average particle diameter of greater than or equal to about 13 nm, an emission peak wavelength in a range of about 440 nm to about 470 nm, and a full width at half maximum (FWHM) of an emission wavelength of less than about 25 nm. A method for preparing the quantum dot, a quantum dot-polymer composite including the quantum dot, and an electronic device including the quantum dot is also disclosed.
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公开(公告)号：US20230086635A1
公开(公告)日：2023-03-23
申请号：US18059075
申请日：2022-11-28
发明人： Garam PARK , Eun Joo JANG , Yongwook KIM , Jihyun MIN , Hyo Sook JANG , Shin Ae JUN , Taekhoon KIM , Yuho WON
摘要： A semiconductor nanocrystal particle including: a core including a first semiconductor material; and a shell disposed on the core, wherein the shell includes a second semiconductor material, wherein the shell is free of cadmium, wherein the shell has at least two branches and at least one valley portion connecting the at least two branches, and wherein the first semiconductor material is different from the second semiconductor material.
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公开(公告)号：US20230079704A1
公开(公告)日：2023-03-16
申请号：US17897609
申请日：2022-08-29
发明人： Sung Woo KIM , Yuho WON , Eun Joo JANG , Hyo Sook JANG
摘要： A semiconductor nanoparticle, a production method thereof, and an electroluminescent device including the same. The production method includes: combining a magnesium precursor and an additive with a chalcogen precursor in a reaction medium including an organic solvent and an organic ligand; heating the reaction medium to a reaction temperature; and reacting the magnesium precursor and the chalcogen precursor in the presence of the additive to form a magnesium chalcogenide, wherein the semiconductor nanoparticle comprises the magnesium chalcogenide, wherein the magnesium chalcogenide comprises magnesium; and selenium, sulfur, or a combination thereof, and wherein the additive includes a hydride compound including an alkali metal, calcium, barium, aluminum, or a combination thereof.
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公开(公告)号：US20230074734A1
公开(公告)日：2023-03-09
申请号：US17895253
申请日：2022-08-25
发明人： Yuho WON , Sung Woo KIM , Eun Joo JANG , Hyo Sook JANG
摘要： An electroluminescent device includes a first electrode; a second electrode spaced apart from the first electrode; and a light emitting layer disposed between the first electrode and the second electrode, the light emitting layer includes semiconductor nanoparticles, wherein the semiconductor nanoparticles do not include cadmium, the semiconductor nanoparticles have a core shell structure, the semiconductor nanoparticles include zinc, selenium, tellurium, and sulfur, wherein in a two dimensional image obtained by an electron microscopy analysis, the semiconductor nanoparticles show an average value of a circularity defined by the following equation of greater than or equal to about 0.8 and less than or equal to about 1: circularity = 4 π × Area [ Perimeter ] 2 wherein Area is an area of a two dimensional image of an individual semiconductor nanoparticle, and Perimeter is a circumference of the two dimensional image of the individual semiconductor nanoparticle.
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公开(公告)号：US20220246876A1
公开(公告)日：2022-08-04
申请号：US17727940
申请日：2022-04-25
发明人： Jihyun MIN , Eun Joo JANG , Edward H. SARGENT , Hyo Sook JANG , Makhsud I. SAIDAMINOV , Sjoerd HOOGLAND , Ankit JAIN , Andrew JOHNSTON , Oleksandr VOZNYY
摘要： A semiconductor nanocrystal particle represented by Chemical Formula 1 and having a full width at half maximum (FWHM) of less than or equal to about 30 nanometers (nm) in the emission wavelength spectrum is provided: AxA′(3+α−x)D(2+β)E(9+γ). Chemical Formula 1 In Chemical Formula 1, A is a first metal including Rb, Cs, or a combination thereof, A′ is an organic substance derived from an ammonium salt, an organic material derived from an organic ligand, or an organic material including a combination thereof, D is a second metal including Sb, Bi, or a combination thereof E is Cl, Br, I, or a combination thereof, 1 0, −1
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公开(公告)号：US20220204844A1
公开(公告)日：2022-06-30
申请号：US17558774
申请日：2021-12-22
发明人： Yuho WON , Hwea Yoon KIM , Jeong Hee LEE , Eun Joo JANG , Hyo Sook JANG
摘要： A quantum dot including zinc, tellurium, selenium, and sulfur, wherein the quantum dot comprises a core and a shell disposed on the core, and wherein the quantum dot is a cadmium-free red light-emitting quantum dot and has an emission peak wavelength of greater than or equal to about 600 nanometers (nm), and efficiency of greater than or equal to about 50%.
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公开(公告)号：US20220137286A1
公开(公告)日：2022-05-05
申请号：US17576895
申请日：2022-01-14
发明人： Tae Hyung KIM , Eun Joo JANG , Shin Ae JUN , Hyun A KANG , Yongwook KIM , Na Youn WON , Hyo Sook JANG
IPC分类号： F21V8/00 , G02F1/13357 , G02F1/1335
摘要： A light source includes a light emitting element which emits light, and a light conversion layer which converts the light emitted from the light emitting element into white light and emits the white light, where the light conversion layer includes a resin and a quantum dot material mixed with the resin, and a red apex of a color region of the white light is positioned in a region of 0.65
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公开(公告)号：US20220017818A1
公开(公告)日：2022-01-20
申请号：US17490552
申请日：2021-09-30
发明人： Yuho WON , Nayoun WON , Sungwoo HWANG , Eun Joo JANG , Soo Kyung KWON , Yong Wook KIM , Jihyun MIN , Garam PARK , Shang Hyeun PARK , Hyo Sook JANG , Shin Ae JUN , Yong Seok HAN
IPC分类号： C09K11/08 , C08L57/10 , G02F1/13357 , H01L51/50 , H01L27/32 , C09K11/02 , C09K11/56 , C09K11/70 , C09K11/88 , H05B33/14
摘要： A cadmium free quantum dot not including cadmium and including: a semiconductor nanocrystal core comprising indium and phosphorous, a first semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core and comprising zinc and selenium, and a second semiconductor nanocrystal shell disposed on the first semiconductor nanocrystal shell and comprising zinc and sulfur, a composition and composite including the same, and an electronic device.
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公开(公告)号：US20210222061A1
公开(公告)日：2021-07-22
申请号：US17226154
申请日：2021-04-09
发明人： Hyo Sook JANG , Yuho WON , Sungwoo HWANG , Ji Yeong KIM , Eun Joo JANG
IPC分类号： C09K11/08 , C08L57/10 , G02F1/13357 , H01L51/50 , H01L27/32 , C09D133/00 , C08F220/06 , C09D133/02
摘要： A cadmium free quantum dot including a semiconductor nanocrystal core and a semiconductor nanocrystal shell disposed on the core, wherein the quantum dot does not include cadmium and includes indium and zinc, the quantum dot has a maximum photoluminescence peak in a red light wavelength region, a full width at half maximum (FWHM) of the maximum photoluminescence peak is less than or equal to about 40 nanometers (nm), an ultraviolet-visible (UV-Vis) absorption spectrum of the quantum dot includes a valley between about 450 nm to a center wavelength of a first absorption peak, and a valley depth (VD) defined by the following equation is greater than or equal to about 0.2, a quantum dot polymer composite including the same, and a display device including the quantum dot-polymer composite: (Absfirst−Absvalley)/Absfirst=VD.
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公开(公告)号：US20210119161A1
公开(公告)日：2021-04-22
申请号：US17072436
申请日：2020-10-16
发明人： Moon Gyu HAN , Heejae LEE , Eun Joo JANG , Tae Ho KIM , Kun Su PARK , Won Sik YOON , Hyo Sook JANG
IPC分类号： H01L51/50
摘要： A quantum dot light-emitting device including first electrode and a second electrode, a quantum dot layer between the first electrode and the second electrode, a first electron transport layer and a second electron layer disposed between the quantum dot layer and the second electrode. The second electron transport layer is disposed between the quantum dot layer and the first electron transport layer, wherein each of the first electron transport layer and the second electron transport layer includes an inorganic material. A lowest unoccupied molecular orbital energy level of the second electron transport layer is shallower than a lowest unoccupied molecular orbital energy level of the first electron transport layer, and a lowest unoccupied molecular orbital energy level of the quantum dot layer is shallower than a lowest unoccupied molecular orbital energy level of the second electron transport layer. An electronic device including the quantum dot light-emitting device.
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