• 专利标题:   Graphene quantum dot composite useful for electronic devices e.g. electroluminescent devices and flexible display devices, comprises dielectric matrix comprising metal oxynitride, and graphene quantum dots dispersed in dielectric matrix.
  • 专利号:   WO2020130325-A1, KR2020077048-A, KR2184401-B1
  • 发明人:   JEON S, PARK M, YOON H, WOO J, PARK M S
  • 专利权人:   KOREA ADVANCED SCI TECHNOLOGY INST
  • 国际专利分类:   B82Y020/00, B82Y040/00, C09K011/02, C09K011/65, H01L051/50
  • 专利详细信息:   WO2020130325-A1 25 Jun 2020 C09K-011/02 202057 Pages: 28
  • 申请详细信息:   WO2020130325-A1 WOKR014548 31 Oct 2019
  • 优先权号:   KR166185

▎ 摘  要

NOVELTY - Graphene quantum dot composite comprises a dielectric matrix comprising a metal oxynitride, and graphene quantum dots dispersed in the dielectric matrix. USE - The composite is useful in an electroluminescent device (claimed), and for electronic and optical devices including electroluminescent devices, color conversion films, lighting equipment and flexible display devices. ADVANTAGE - The composite suppresses quenching caused by aggregation of graphene quantum dots, improves quantum efficiency of graphene quantum dots, and maintains stability of light emitting material of LED. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for producing graphene quantum dot composite, involving preparing a mixed solution containing nitrogen-containing hydride and metal hydroxide, reacting the nitrogen-containing hydride with the metal hydroxide to include a metal oxynitride, and forming a dielectric matrix in which the graphene quantum dots are dispersed; and (2) an electroluminescent device comprising lower electrode, an upper electrode spaced apart from the lower electrode, and a light emitting layer arranged between the lower electrode and the upper electrode, and comprising the graphene quantum dot composite.