公开(公告)号：US10822543B2

公开(公告)日：2020-11-03

申请号：US16182885

申请日：2018-11-07

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Chuljong Han ,  Byungwook Yoo ,  Jiyong Kim ,  Jeongmin Yi

IPC: H01B1/06 ,  C09K11/00 ,  C09K11/70 ,  C09K11/62 ,  H01L31/0352 ,  B82Y5/00 ,  B82Y15/00 ,  C09K11/56 ,  C09K11/02

Abstract: The present disclosure provides a quantum dot having a core-shell structure. To have superior quantum efficiency and optical stability, the quantum dot is of a five element system of Zn—Cu—In—P—S. The quantum dot includes a core formed of In(Zn)P material and doped with copper. The quantum dot further comprises a first shell formed of Cu—Zn—In—S material and surrounding the core and a second shell formed ZnS material and surrounding the first shell.

公开(公告)号：US10371828B2

公开(公告)日：2019-08-06

申请号：US15992060

申请日：2018-05-29

Applicant: Korea Electronics Technology Institute

Inventor： Chuljong Han ,  Jeongno Lee ,  Minsuk Oh ,  Byungwook Yoo

IPC: G01T1/20 ,  G21K4/00 ,  A61B6/00 ,  G01T1/24 ,  G01T1/16

Abstract: Disclosed are a scintillator using semiconductor quantum dots, a method of manufacturing the scintillator, and a digital image diagnostic system employing the scintillator. In one aspect, the scintillator includes a metallic reflection film made of a metal configured to transmit an X-ray and reflecting visible light and having a plurality of voids formed in a thickness direction. The scintillator also includes a polymer film formed inside the plurality of voids and being configured to include a plurality of columnar structures to convert the X-ray into the visible light. The scintillator further includes semiconductor quantum dots dispersed in the polymer film and having a decay time of tens of nanoseconds.