Patents by Inventor A Ra HONG

A Ra HONG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11680204
    Abstract: The present disclosure relates to down-shifting nanophosphors, a method for preparing the same, and a luminescent solar concentrator (LSC) using the same. The down-shifting nanophosphors according to an embodiment of the present disclosure include a core including NaYF4 nanocrystals doped with neodymium (Nd) and ytterbium (Yb), and further include a neodymium (Nd)-doped crystalline shell surrounding the core, or further include a NaYF4 crystalline shell surrounding the crystalline shell. Therefore, the down-shifting nanophosphors efficiently absorb near infrared rays with a wavelength range of 700-900 nm and efficiently emit near infrared rays with a wavelength range of 950-1050 nm. In addition, the down-shifting nanophosphors according to an embodiment of the present disclosure has a size of 60 nm or less, and thus can be applied to manufacture transparent LSC films with ease and can realize transparent solar cell modules having high near infrared ray shifting efficiency.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: June 20, 2023
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Ho Seong Jang, Hyungduk Ko, Gumin Kang, So Hye Cho, Seung Yong Lee, A Ra Hong
  • Patent number: 11680205
    Abstract: Provided is a core/multishell tetragonal upconversion nanophosphor capable of being excited by near-infrared (NIR) light having wavelengths of 800±20 nm, 980±20 nm, and 1532±20 nm to emit light of blue, green, red, and combinations thereof.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: June 20, 2023
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Ho Seong Jang, Gumin Kang, A-Ra Hong, Seung Yong Lee
  • Publication number: 20220064526
    Abstract: Provided is a core/multishell tetragonal upconversion nanophosphor capable of being excited by near-infrared (NIR) light having wavelengths of 800±20 nm, 980±20 nm, and 1532±20 nm to emit light of blue, green, red, and combinations thereof.
    Type: Application
    Filed: July 8, 2021
    Publication date: March 3, 2022
    Inventors: Ho Seong JANG, Gumin KANG, A-Ra HONG, Seung Yong LEE
  • Patent number: 11254866
    Abstract: Provided is a fluoride nanophosphor using, as cores, luminescent nanoparticles expressed by Chemical Formula 1. LiEr1-x-yLyF4:Tm3+x??[Chemical Formula 1] (In Chemical Formula 1, x is a real number satisfying 0?x?0.3, y is a real number satisfying 0?y?0.8 and is selected within a range satisfying 0?x+y?0.9, and L is any one selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), ytterbium (Yb), lutetium (Lu), and a combination thereof.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: February 22, 2022
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Ho Seong Jang, A Ra Hong, So Hye Cho, Seung Yong Lee
  • Publication number: 20210332293
    Abstract: The present disclosure relates to down-shifting nanophosphors, a method for preparing the same, and a luminescent solar concentrator (LSC) using the same. The down-shifting nanophosphors according to an embodiment of the present disclosure include a core including NaYF4 nanocrystals doped with neodymium (Nd) and ytterbium (Yb), and further include a neodymium (Nd)-doped crystalline shell surrounding the core, or further include a NaYF4 crystalline shell surrounding the crystalline shell. Therefore, the down-shifting nanophosphors efficiently absorb near infrared rays with a wavelength range of 700-900 nm and efficiently emit near infrared rays with a wavelength range of 950-1050 nm. In addition, the down-shifting nanophosphors according to an embodiment of the present disclosure has a size of 60 nm or less, and thus can be applied to manufacture transparent LSC films with ease and can realize transparent solar cell modules having high near infrared ray shifting efficiency.
    Type: Application
    Filed: December 15, 2020
    Publication date: October 28, 2021
    Inventors: Ho Seong JANG, Hyungduk KO, Gumin KANG, So Hye CHO, Seung Yong LEE, A Ra HONG
  • Patent number: 11066598
    Abstract: Provided is a dye-sensitized upconversion nanophosphor including a core, a first shell surrounding at least part of the core, and an organic dye bonded to a surface of the nanophosphor which has an absorption band ranging from 650 nm to 850 nm and which is excited in a near-infrared region to emit visible light. The dye-sensitized upconversion nanophosphor may be included in a display apparatus, a fluorescent contrast agent, or an anti-counterfeiting code. The organic dye may be an IR-808 dye.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: July 20, 2021
    Assignee: Korea Institute of Science and Technology
    Inventors: Ho Seong Jang, Joon Soo Han, A Ra Hong, So Hye Cho, Seung Yong Lee, Hyung Duk Ko
  • Publication number: 20200308484
    Abstract: Provided is a fluoride nanophosphor using, as cores, luminescent nanoparticles expressed by Chemical Formula 1. LiEr1-x-yLyF4:Tm3+x??[Chemical Formula 1] (In Chemical Formula 1, x is a real number satisfying 0?x?0.3, y is a real number satisfying 0?y?0.8 and is selected within a range satisfying 0?x+y?0.9, and L is any one selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), ytterbium (Yb), lutetium (Lu), and a combination thereof.
    Type: Application
    Filed: November 14, 2019
    Publication date: October 1, 2020
    Inventors: Ho Seong JANG, A Ra HONG, So Hye CHO, Seung Yong LEE
  • Publication number: 20200079994
    Abstract: Provided is a dye-sensitized upconversion nanophosphor including a core, a first shell surrounding at least part of the core, and an organic dye bonded to a surface of the nanophosphor to have an absorption band ranging from 650 nm to 850 nm and be excited in a near-infrared region to emit visible light.
    Type: Application
    Filed: March 6, 2019
    Publication date: March 12, 2020
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Ho Seong JANG, Joon Soo HAN, A Ra HONG, So Hye CHO, Seung Yong LEE, Hyung Duk KO
  • Patent number: 10159758
    Abstract: Provided is a nanophosphor having a core/double shell structure, the nanophosphor including a upconversion core including a Yb3+, Ho3+, and Ce3+? co-doped fluoride-based nanophosphor represented by Formula 1; a first shell surrounding at least a portion of the upconversion core, and comprising a Nd3+ and Yb3+ co-doped fluoride-based crystalline composition represented by Formula 2; and a second shell surrounding at least a portion of the first shell, and having paramagnetic properties represented by Formula 3.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: December 25, 2018
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Ho Seong Jang, So Hye Cho, Seung Yong Lee, A Ra Hong
  • Publication number: 20180303959
    Abstract: Provided is a nanophosphor having a core/double shell structure, the nanophosphor including a upconversion core including a Yb3+, Ho3+, and Ce3+? co-doped fluoride-based nanophosphor represented by Formula 1; a first shell surrounding at least a portion of the upconversion core, and comprising a Nd3+ and Yb3+ co-doped fluoride-based crystalline composition represented by Formula 2; and a second shell surrounding at least a portion of the first shell, and having paramagnetic properties represented by Formula 3.
    Type: Application
    Filed: January 15, 2018
    Publication date: October 25, 2018
    Inventors: Ho Seong JANG, So Hye CHO, Seung Yong LEE, A Ra HONG