Patents by Inventor Bitnari Kim

Bitnari Kim 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).

  • Publication number: 20240341110
    Abstract: The present disclosure relates to a plurality of host materials comprising at least one first host compound represented by the following Formula 1 and at least one second host compound represented by the following Formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of host materials according to the present disclosure in the light-emitting layer, an organic electroluminescent device exhibiting low driving voltage and/or high luminous efficiency and/or long lifespan characteristics can be manufactured.
    Type: Application
    Filed: February 14, 2024
    Publication date: October 10, 2024
    Inventors: Bitnari KIM, Young-Jae KIM, Hee-Ryong KANG, Sang-Hee CHO, So-Young JUNG, Tae-Jun HAN, Mi-Ran SEO
  • Patent number: 12082496
    Abstract: The present disclosure relates to a composition material for an organic electroluminescent device, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the composition material for an organic electroluminescent device of the present disclosure, it is possible to provide an organic electroluminescent device having high luminous efficiency and/or long lifespan characteristics.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: September 3, 2024
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Bitnari Kim, Sang-Hee Cho, Hyo-Jung Lee, Ye-Jin Jeon, Hyun-Ju Kang, Su-Hyun Lee, Jeong-Eun Yang
  • Patent number: 12049468
    Abstract: The present disclosure relates to a plurality of host materials comprising a compound represented by formula 1 and a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising the plurality of host materials comprising a specific combination of compounds, it is possible to provide an organic electroluminescent device having long lifespan characteristics.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: July 30, 2024
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Bitnari Kim, Su-Hyun Lee, Doo-Hyeon Moon, Hyo-Soon Park, Tae-Jun Han, Sang-Hee Cho
  • Publication number: 20240228873
    Abstract: The present invention relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention can be comprised in a light-emitting layer or an electron buffer layer, and is effective to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and significantly improved operational lifespan.
    Type: Application
    Filed: February 20, 2024
    Publication date: July 11, 2024
    Inventors: Hee-Ryong KANG, Jin-Ri HONG, Bitnari KIM, Sang-Hee CHO
  • Publication number: 20240188432
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material having a compound represented by formula 1, and a second host material having a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having higher luminous efficiency and/or longer lifespan properties as compared with a conventional organic electroluminescent device.
    Type: Application
    Filed: February 1, 2024
    Publication date: June 6, 2024
    Inventors: Bitnari KIM, Su-Hyun LEE, Hyo-Soon PARK, Tae-Jun HAN, Jeong-Eun YANG, Sang-Hee CHO, Doo-Hyeon MOON
  • Publication number: 20240188424
    Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.
    Type: Application
    Filed: October 13, 2023
    Publication date: June 6, 2024
    Inventors: Su-Hyun LEE, Kyung-Hoon CHOI, So-Young JUNG, Chi-Sik KIM, Soo-Yong LEE, Sang-Hee CHO, Young-Jun CHO, Young-Gil KIM, Bitnari KIM, Young-Jae KIM, Hyo-Nim SHIN
  • Publication number: 20240122069
    Abstract: The present disclosure relates to a plurality of host materials and organic electroluminescent devices comprising the same. The present disclosure may provide a plurality of host materials having a composition favorable to thermal denaturation due to a low deposition temperature, while improving hole properties and electronic properties of HOMO and LUMO, by comprising separate compounds represented by formulas 1 and 2 into a light-emitting layer. By comprising the plurality of host materials of the present disclosure, it is possible to provide an organic electroluminescent device having a lower driving voltage, higher luminous efficiency and/or longer lifetime.
    Type: Application
    Filed: November 10, 2023
    Publication date: April 11, 2024
    Inventors: Bitnari KIM, Su-Hyun LEE, So-Young JUNG, Hyo-Soon PARK, Tae-Jun HAN, Young-Jun CHO, Sang-Hee CHO
  • Publication number: 20240099132
    Abstract: The present invention relates to an organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant; the host comprises plural host compounds; at least a first host compound of the plural host compounds has a structure of a nitrogen-containing heterocyclic linker bonded to a nitrogen atom of a carbazole of an indole-carbazole, indene-carbazole, benzofuran-carbazole, or benzothiophene-carbazole residue; and a second host compound has a carbazole-aryl-carbazole or carbazole-carbazole structure. According to the present invention, by using a specific multi-component host different from the conventional organic electroluminescent device, an organic electroluminescent device of significantly improved lifespan is provided.
    Type: Application
    Filed: November 15, 2023
    Publication date: March 21, 2024
    Inventors: Kyoung-Jin PARK, Bitnari KIM, Yoo-Jin DOH, Hyun-Ju KANG, Young-Mook LIM, Su-Hyun LEE, Chi-Sik KIM
  • Publication number: 20240057472
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. The organic electroluminescent device of the present disclosure can exhibit excellent lifespan characteristics while maintaining high luminous efficiency by including a specific combination of a plurality of host compounds.
    Type: Application
    Filed: June 29, 2023
    Publication date: February 15, 2024
    Inventors: Sang-Hee CHO, Doo-Hyeon MOON, Bitnari KIM
  • Patent number: 11856850
    Abstract: The present disclosure relates to a plurality of host materials and organic electroluminescent devices comprising the same. The present disclosure may provide a plurality of host materials having a composition favorable to thermal denaturation due to a low deposition temperature, while improving hole properties and electronic properties of HOMO and LUMO, by comprising separate compounds represented by formulas 1 and 2 into a light-emitting layer. By comprising the plurality of host materials of the present disclosure, it is possible to provide an organic electroluminescent device having a lower driving voltage, higher luminous efficiency and/or longer lifetime.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: December 26, 2023
    Inventors: Bitnari Kim, Su-Hyun Lee, So-Young Jung, Hyo-Soon Park, Tae-Jun Han, Young-Jun Cho, Sang-Hee Cho
  • Publication number: 20230345827
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material having a compound represented by formula 1, and a second host material having a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having long lifetime properties while having an equivalent or improved level of power efficiency compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: November 17, 2022
    Publication date: October 26, 2023
    Inventors: Bitnari KIM, Doo-Hyeon MOON, Su-Hyun LEE, Du-Yong PARK, So-Young JUNG, Hae-Yeon KIM, Sang-Hee CHO
  • Patent number: 11793075
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the host materials according to the present disclosure, an organic electroluminescent device having a high power efficiency and/or long lifespan can be provided.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: October 17, 2023
    Inventors: Bitnari Kim, Su-Hyun Lee, Doo-Hyeon Moon, So-Young Jung, Du-Yong Park, Hae-Yeon Kim, Sang-Hee Cho, Jin-Ri Hong
  • Patent number: 11737353
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. The organic electroluminescent device of the present disclosure can exhibit excellent lifespan characteristics while maintaining high luminous efficiency by including a specific combination of a plurality of host compounds.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: August 22, 2023
    Inventors: Sang-Hee Cho, Doo-Hyeon Moon, Bitnari Kim
  • Patent number: 11708328
    Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, it is possible to provide an organic electroluminescent device having low driving voltage and/or improved lifespan properties.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: July 25, 2023
    Inventors: Su-Hyun Lee, Hyo-Soon Park, Tae-Jun Han, Bitnari Kim
  • Publication number: 20230126428
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material having a compound represented by formula 1, and a second host material having a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having long lifetime properties while having an equivalent or improved level of power efficiency compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: November 21, 2022
    Publication date: April 27, 2023
    Inventors: Bitnari KIM, Doo-Hyeon MOON, Su-Hyun LEE, Du-Yong PARK, So-Young JUNG, Hae-Yeon KIM, Sang-Hee CHO
  • Patent number: 11552257
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material having a compound represented by formula 1, and a second host material having a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having long lifetime properties while having an equivalent or improved level of power efficiency compared to conventional organic electroluminescent devices.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: January 10, 2023
    Inventors: Bitnari Kim, Doo-Hyeon Moon, Su-Hyun Lee, Du-Yong Park, So-Young Jung, Hae-Yeon Kim, Sang-Hee Cho
  • Publication number: 20230006147
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the specific combination of compounds according to the present disclosure as a plurality of host materials according to the present disclosure, it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime property compared to the conventional organic electroluminescent devices.
    Type: Application
    Filed: May 26, 2022
    Publication date: January 5, 2023
    Inventors: Sang-Hee Cho, Bitnari Kim, Young-Jae Kim, So-Young Jung, Mi-Ja Lee, Su-Hyun Lee, Tae-Jun Han, HaeYeon Kim
  • Publication number: 20220384744
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host compound represented by formula 1 and a second host compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising the specific combination of the compound as host materials, an organic electroluminescent device having low driving voltage, high luminous efficiency and/or long lifespan can be provided compared with a conventional organic electroluminescent device.
    Type: Application
    Filed: August 28, 2019
    Publication date: December 1, 2022
    Inventors: Su-Hyun LEE, Bitnari KIM, So-Young JUNG, Hyo-Nim SHIN, Mi-Ja LEE
  • Patent number: 11495750
    Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, an organic electroluminescent device having low driving voltage, high luminous efficiency, and/or excellent lifespan characteristics can be provided.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: November 8, 2022
    Inventors: Doo-Hyeon Moon, Bitnari Kim, Sang-Hee Cho
  • Publication number: 20220290042
    Abstract: The present invention relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention can be comprised in a light-emitting layer or an electron buffer layer, and is effective to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and significantly improved operational lifespan.
    Type: Application
    Filed: May 24, 2022
    Publication date: September 15, 2022
    Inventors: Hee-Ryong Kang, Jin-Ri Hong, Bitnari Kim, Sang-Hee Cho