公开(公告)号：US11588079B2

公开(公告)日：2023-02-21

申请号：US17163329

申请日：2021-01-29

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION ,  SN DISPLAY CO., LTD.

Inventor： Tae-woo Lee ,  Younghoon Kim ,  Himchan Cho

IPC: H01L33/50 ,  C09K11/02 ,  G02F1/355 ,  C09K11/06 ,  G02F1/377

Abstract: Provided are a wavelength converting particle, a method for manufacturing a wavelength converting particle, and a light-emitting diode containing a wavelength converting particle. The wavelength converting particle comprises a hybrid OIP nanocrystal that converts a wavelength of light generated by an excitation light source into a specified wavelength. Accordingly, it is possible to optically stabilize and improve color purity and light-emission performance without changes in a light-emitting wavelength range.

公开(公告)号：US10424696B2

公开(公告)日：2019-09-24

申请号：US15524761

申请日：2015-11-06

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Taewoo Lee ,  Younghoon Kim ,  Himchan Cho

IPC: H01L33/50 ,  G02F1/355 ,  G02F1/377 ,  C09K11/02 ,  C09K11/06

Abstract: Provided are a wavelength converting particle, a method for manufacturing a wavelength converting particle, and a light-emitting diode containing a wavelength converting particle. The wavelength converting particle comprises an organic/inorganic/hybrid perovskite nanocrystal that converts a wavelength of light generated by an excitation light source into a specified wavelength. Accordingly, it is possible to optically stabilize and improve color purity and light-emission performance without changes in a light-emitting wavelength range.

公开(公告)号：US10263207B2

公开(公告)日：2019-04-16

申请号：US15524754

申请日：2015-11-06

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Taewoo Lee ,  Sanghyuk Im ,  Himchan Cho ,  Younghoon Kim

IPC: H01L51/50 ,  C09K11/06 ,  H01G9/20 ,  H01L51/00 ,  C09D127/18 ,  H01B1/12

Abstract: Provided are a perovskite light emitting device containing an exciton buffer layer, and a method for manufacturing the same. A light emitting device of the present invention comprises: an exciton buffer layer in which a first electrode, a conductive layer disposed on the first electrode and comprising a conductive material, and a surface buffer layer containing fluorine-based material having lower surface energy than the conductive material are sequentially deposited; a light-emitting layer disposed on the exciton buffer layer and containing an organic-inorganic hybrid perovskite light emitting body; and a second electrode disposed on the light-emitting layer. Accordingly, an organic-inorganic hybrid perovskite is formed with a combined FCC and BSS crystal structure in a nanoparticle light-emitting body; the present invention forms a lamellar structure in which an organic plane and an inorganic plane are alternatively deposited; and an exciton is bound by the inorganic plane, thereby being capable of expressing high color purity.

公开(公告)号：US11205757B2

公开(公告)日：2021-12-21

申请号：US15524735

申请日：2015-11-06

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Taewoo Lee ,  Sanghyuk Im ,  Younghoon Kim ,  Himchan Cho

IPC: H01L51/50 ,  H01L51/00 ,  C09K11/02 ,  C09K11/06 ,  C09K11/66 ,  H01G9/20 ,  H01L51/42 ,  B01J13/06 ,  B82Y20/00 ,  B82Y40/00 ,  B82Y30/00

Abstract: Provided are a core-shell structured perovskite particle light-emitter, a method of preparing the same, and a light emitting device using the same. The core-shell structured perovskite particle light-emitter or metal halide perovskite particle light-emitter has a perovskite nanocrystal structure and a core-shell structured particle structure. Therefore, in the perovskite particle light-emitter of the present invention, as a shell is formed of a substance having a wider band gap than that of a core, excitons may be more dominantly confined in the core, and durability of the nanocrystal may be improved to prevent exposure of the core perovskite to the air using a perovskite or inorganic semiconductor, which is stable in the air, or a polymer.

公开(公告)号：US10923636B2

公开(公告)日：2021-02-16

申请号：US16578264

申请日：2019-09-20

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Tae-woo Lee ,  Younghoon Kim ,  Himchan Cho

IPC: H01L33/50 ,  C09K11/06 ,  C09K11/02 ,  G02F1/355 ,  G02F1/377

Abstract: Provided are a wavelength converting particle, a method for manufacturing a wavelength converting particle, and a light-emitting diode containing a wavelength converting particle. The wavelength converting particle comprises a hybrid OIP nanocrystal that converts a wavelength of light generated by an excitation light source into a specified wavelength. Accordingly, it is possible to optically stabilize and improve color purity and light-emission performance without changes in a light-emitting wavelength range.

公开(公告)号：US10047284B2

公开(公告)日：2018-08-14

申请号：US15524747

申请日：2015-11-06

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Taewoo Lee ,  Sanghyuk Im ,  Younghoon Kim ,  Himchan Cho

IPC: H01L35/24 ,  H01L51/00 ,  H01L21/00 ,  C09K11/06 ,  C09K11/02 ,  H01G9/20 ,  H01L51/50 ,  H01L51/56 ,  H01L51/42

Abstract: Provided are an organic/inorganic/hybrid perovskite nanocrystal particle light-emitter having a gradient structure, a method of producing the same, and a light emitting element using the same. The organic/inorganic/hybrid perovskite nanocrystal particle light-emitter having a gradient structure includes an organic/inorganic/hybrid perovskite nanocrystal which is dispersible in an organic solvent, wherein the nanocrystal has a gradient composition in which a composition is changed from the center thereof to the outside. Therefore, the gradual change in the content in the nanocrystal may be used to uniformly adjust a fraction in the nanocrystal, to reduce surface oxidation, and to improve exciton confinement in the perovskite present in large quantities inside the nanocrystal, and thus light luminescence efficiency may be improved and durability and stability may be increased.