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Title:
GRAPHENE QUANTUM DOT-BASED INK COMPOSITION FOR SECURITY PRINTING, AND SECURITY LABEL USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/075550
Kind Code:
A1
Abstract:
A disclosed ink composition for security printing comprises a graphene quantum dot composite. The graphene quantum dot composite comprises: a dielectric matrix having a hydroxyl group; and graphene quantum dots dispersed in the dielectric matrix and having an oxygen content of 10 at% or less, and has afterglow characteristics of emitting phosphorescence at room temperature.

Inventors:
JEON SEOKWOO (KR)
PARK MINSU (KR)
Application Number:
PCT/KR2021/007365
Publication Date:
April 14, 2022
Filing Date:
June 11, 2021
Export Citation:
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Assignee:
KOREA ADVANCED INST SCI & TECH (KR)
International Classes:
C09D11/50; B41M3/14; B42D25/373; B42D25/378
Foreign References:
KR100744351B12007-07-30
KR20190078857A2019-07-05
Other References:
PARK MINSU , KIM HYUNG SUK , YOON HYEWON , KIM JIN , LEE SUK KI , YOO SEUNGHYUP , JEON, SEOKWOO: "Tunable Singlet-Triplet Energy Splitting of Graphene Quantum Dots", IMID 2020. 20TH INTERNATIONAL MEETING ON INFORMATION DISPLAY; ONLINE; AUGUST 25-28, 2020, THE KOREAN INFORMATION DISPLAY SOCIETY, KOREA, vol. 20, 25 August 2020 (2020-08-25), Korea, pages 516, XP009536254
MINSU PARK, HYEWON YOON, JAEHO LEE, JUNGMO KIM, JINHO LEE, SEONG-EUI LEE, SEUNGHYUP YOO, SEOKWOO JEON: "Efficient Solid-State Photoluminescence of Graphene Quantum Dots Embedded in Boron Oxynitride for AC-Electroluminescent Device", ADVANCED MATERIALS, vol. 30, no. 38, 1 September 2018 (2018-09-01), DE , pages 1 - 8, XP055721552, ISSN: 0935-9648, DOI: 10.1002/adma.201802951
PARK MINSU, KIM HYUNG SUK, YOON HYEWON, KIM JIN, LEE SUKKI, YOO SEUNGHYUP, JEON SEOKWOO: "Controllable Singlet–Triplet Energy Splitting of Graphene Quantum Dots through Oxidation: From Phosphorescence to TADF", ADVANCED MATERIALS, vol. 32, no. 31, 1 August 2020 (2020-08-01), DE , pages 1 - 10, XP055919500, ISSN: 0935-9648, DOI: 10.1002/adma.202000936
Attorney, Agent or Firm:
PARK, Young-woo (KR)
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