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公开(公告)号：US11512254B2
公开(公告)日：2022-11-29
申请号：US17036122
申请日：2020-09-29
发明人： Tae Hyung Kim , Yuho Won , Eun Joo Jang , Heejae Chung , Oul Cho
摘要： A quantum dot including a core including a first semiconductor nanocrystal including a Group III-V compound, and a shell disposed on the core and including a semiconductor nanocrystal including a Group II-VI compound, wherein the quantum dots do not include cadmium, the shell includes a first layer disposed directly on the core and including a second semiconductor nanocrystal including zinc and selenium, a second layer, the second layer being an outermost layer of the shell and including a third semiconductor nanocrystal including zinc and sulfur, and a third layer disposed between the first layer and the second layer and including a fourth semiconductor nanocrystal including zinc, selenium, and optionally sulfur, and a difference between a peak emission wavelength of a colloidal solution of the quantum dot and a peak emission wavelength of a film prepared from the colloidal solution is less than or equal to about 5 nanometers (nm).
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公开(公告)号：US11296294B2
公开(公告)日：2022-04-05
申请号：US16910369
申请日：2020-06-24
发明人： Hyo Sook Jang , Tae Hyung Kim , Eun Joo Jang , Oul Cho
IPC分类号： H01L51/50
摘要： A display device including a light source; and a quantum dot emission layer disposed on the light source, wherein the quantum dot emission layer includes a first emission layer disposed in a red pixel of the display device, and a second emission layer disposed in a green pixel of the display device, the light source includes a first portion configured to supply a first incident light to the first emission layer, a second portion configured to supply a second incident light to the second emission layer, and a third portion configured to supply a third light to a blue pixel of the display device, the first emission layer includes red light emitting quantum dots and the second emission layer includes green light emitting quantum dots, and each of the first portion, the second portion, and the third portion comprises a layer comprising blue light emitting quantum dots.
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73.发明授权公开(公告)号：US11180694B2
公开(公告)日：2021-11-23
申请号：US16851625
申请日：2020-04-17
发明人： Jeong Hee Lee , Hyun A Kang , Sung Woo Kim , Jin A Kim , Tae Hyung Kim , Yuho Won , Eun Joo Jang
摘要： A method of producing a quantum dot comprising zinc selenide, the method comprising: providing an organic ligand mixture comprising a carboxylic acid compound, a primary amine compound, a secondary amide compound represented by Chemical Formula 1, and a first organic solvent: RCONHR Chemical Formula 1 wherein each R is as defined herein; heating the organic ligand mixture in an inert atmosphere at a first temperature to obtain a heated organic ligand mixture; adding a zinc precursor, a selenium precursor, and optionally a tellurium precursor to the heated organic ligand mixture to obtain a reaction mixture, wherein the zinc precursor does not comprise oxygen; and heating the reaction mixture at a first reaction temperature to synthesize a first semiconductor nanocrystal particle.
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公开(公告)号：US11018311B2
公开(公告)日：2021-05-25
申请号：US16797380
申请日：2020-02-21
发明人： Dae Young Chung , Eun Joo Jang , Oul Cho , Hyun A Kang , Tae Hyung Kim , Yun Sung Woo , Jeong Hee Lee
摘要： An electronic device includes a first electrode and a second electrode facing each other, an emission layer comprising a plurality of quantum dots, wherein the emission layer is disposed between the first electrode and the second electrode; a first charge auxiliary layer disposed between the first electrode and the emission layer; and an optical functional layer disposed on the second electrode on a side opposite the emission layer, wherein the first electrode includes a reflecting electrode, wherein the second electrode is a light-transmitting electrode, wherein a region between the optical functional layer and the first electrode comprises a microcavity structure, and a refractive index of the optical functional layer is greater than or equal to a refractive index of the second electrode.
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公开(公告)号：US11011721B2
公开(公告)日：2021-05-18
申请号：US16863164
申请日：2020-04-30
发明人： Tae Hyung Kim , Eun Joo Jang , Dae Young Chung , Yong Wook Kim , Yuho Won , Oul Cho
摘要： An electroluminescence display device, including a first electrode and a second electrode facing each other; a quantum dot emission layer disposed between the first electrode and the second electrode, the quantum dot emission layer including a plurality of quantum dots and not including cadmium, wherein the quantum dot emission layer includes a red emission layer disposed in a red pixel, a green emission layer disposed in a green pixel, and a blue emission layer disposed in a blue pixel, wherein the device has color reproducibility according to a DCI standard of greater than or equal to about 89%.
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76.发明授权公开(公告)号：US11011720B2
公开(公告)日：2021-05-18
申请号：US16298357
申请日：2019-03-11
发明人： Tae Hyung Kim , Sung Woo Kim , Jin A Kim , Yuho Won , Jeong Hee Lee , Eun Joo Jang , Oul Cho
摘要： A quantum dot including a core including a first semiconductor nanocrystal including zinc, tellurium, and selenium and a semiconductor nanocrystal shell disposed on the core and including zinc, tellurium, selenium, and sulfur, a production method thereof, and an electronic device including the same. The quantum dot is free of cadmium, the quantum dot has a mole ratio of tellurium with respect to selenium of less than or equal to about 0.06:1, a photoluminescence peak wavelength of the quantum dot is greater than or equal to about 450 nm and less than or equal to about 470 nanometers (nm), and a full width at half maximum (FWHM) of a photoluminescence peak of the quantum dot is less than or equal to about 41 nm.
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公开(公告)号：US11011673B2
公开(公告)日：2021-05-18
申请号：US16442926
申请日：2019-06-17
发明人： Kun Su Park , Tae Ho Kim , Sung Woo Kim , Chan Su Kim , Tae Hyung Kim , Eun Joo Jang
摘要： A quantum dot device including a first electrode and a second electrode facing each other, a quantum dot layer disposed between the first electrode and the second electrode and an electron auxiliary layer disposed between the quantum dot layer and the second electrode, wherein the electron auxiliary layer includes an electron-transporting material represented by Chemical Formula 1 and an electron-controlling material capable of decreasing electron mobility of the electron auxiliary layer, and a display device. Zn1-xMxO Chemical Formula 1 In Chemical Formula 1, M and x are the same as described in the detailed description.
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公开(公告)号：US11005060B2
公开(公告)日：2021-05-11
申请号：US16356148
申请日：2019-03-18
发明人： Dae Young Chung , Moon Gyu Han , Oul Cho , Tae Hyung Kim , Sujin Park , Hongkyu Seo , Eun Joo Jang
摘要： An electroluminescent device including a first electrode, a hole transport layer disposed on the first electrode, a first emission layer disposed on the hole transport layer, the first emission layer including a first light emitting particle on which a first ligand having a hole transporting property is attached, a second emission layer disposed on the first emission layer, the second emission layer including a second light emitting particle on which a second ligand having an electron transporting property is attached, an electron transport layer disposed on the second emission layer, and a second electrode disposed on the electron transport layer, wherein a solubility of the first ligand in a solvent is different than a solubility of the second ligand in the solvent and a display device including the same.
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公开(公告)号：US10954441B2
公开(公告)日：2021-03-23
申请号：US16298276
申请日：2019-03-11
发明人： Tae Hyung Kim , Jeong Hee Lee , Sung Woo Kim , Jin A Kim , Yuho Won , Eun Joo Jang
摘要： A quantum dot includes a core including a first semiconductor nanocrystal material including zinc, tellurium, and selenium; and a semiconductor nanocrystal shell disposed on (e.g., directly on) the core and including zinc, selenium, and sulfur, wherein the quantum dot does not include cadmium, wherein a size of the quantum dot is greater than or equal to about 10 nanometers (nm) and the quantum dot includes at least four protrusions. A production method thereof and an electronic device including the same are also disclosed.
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公开(公告)号：US10948770B2
公开(公告)日：2021-03-16
申请号：US15238127
申请日：2016-08-16
发明人： Tae Hyung Kim , Eun Joo Jang , Hyun A Kang , Yongwook Kim , Jihyun Min , Jeong Hee Lee , Shin Ae Jun , Oul Cho
IPC分类号： G02F1/1335 , G02F1/13357 , F21V8/00 , H01L33/50 , B82Y20/00 , B82Y30/00
摘要： A light source includes a light emitting element and a light conversion layer configured to convert light emitted from the light emitting element into white light; wherein the light conversion layer includes a matrix resin and a quantum dot, wherein the white light includes a red light component, a green light component, and a blue light component each having a color purity configured to display a color gamut having a concordance rate of greater than or equal to about 99.0% with an Adobe RGB color gamut of a display device, and wherein the green light component has a peak wavelength of about 525 nanometers to about 528 nanometers and a full width at half maximum of less than or equal to about 40 nanometers, and a red light component having a peak wavelength of about 625 nanometers to about 645 nanometers.
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