Patents by Inventor Hong-Yeop Na

Hong-Yeop Na 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: 20180226584
    Abstract: The present invention relates to a polymeric charge transfer layer comprising a polymer and a p-dopant. The polymer comprises as polymerized units, Monomer A, Monomer B, and Monomer C crosslinking agent. The present invention further relates to an organic electronic device, especially an organic light emitting device containing the polymeric charge transfer layer.
    Type: Application
    Filed: January 8, 2015
    Publication date: August 9, 2018
    Inventors: Liam P. Spencer, Hong-Yeop Na, Yoo-Jin Doh, Chun Liu, Minrong Zhu, Jichang Feng, Zhengming Tang, Shaoguang Feng, Kenneth L. Kearns, JR., Timothy De Vries, Sukrit Mukhopadhyay, John W. Kramer, Peter Trefonas, III, David D. Devore, William H. H. Woodward
  • Publication number: 20180190912
    Abstract: The present invention relates to a luminescent material for delayed fluorescence and an organic electroluminescent device comprising the same. By using the luminescent material for delayed fluorescence according to the present invention, an organic electroluminescent device having long lifespan, low driving voltage, excellent color purity, and significantly improved luminous efficiency such as current efficiency is provided.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 5, 2018
    Inventors: Jeong-Hwan Jeon, Hong Yeop Na, Hee-Choon Ahn
  • Patent number: 10005729
    Abstract: Organic compounds suitable for organic layers of electronic devices that show improved luminescent properties.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: June 26, 2018
    Assignees: ROHM AND HAAS ELECTRONIC MATERIALS KOREA LTD, DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Zhengming Tang, Chong Xing, Shaoguang Feng, Hong-Yeop Na, Minrong Zhu, Robert J. Wright, David D. Devore
  • Publication number: 20180151807
    Abstract: A composition suitable for organic layers of electronic devices that shows improved luminescent properties, and electronic devices comprising organic layers comprising such composition.
    Type: Application
    Filed: May 29, 2015
    Publication date: May 31, 2018
    Inventors: Zhengming Tang, Moo Keun Chee, Hong Yeop Na, Hua Ren, Shaoguang Feng
  • Publication number: 20180138407
    Abstract: A compound having a four-coordinate boron atom to which is connected a first C3-C25 substituent, a second C3-C25 substituent and a bridging substituent comprising from eight to forty non-hydrogen atoms and having two bonds to the boron atom; wherein: (i) each of the first and second C3-C25 substituents is bonded to the boron atom through a carbon, nitrogen or oxygen atom, and, optionally the first and second C3-C25 substituents are connected to form a single substituent having two bonds to the boron atom; (ii) at least one of the first and second C3-C25 substituents is a C6-C25 aromatic substituent; (iii) said aromatic substituent comprises at least one nitrogen atom which is bonded only to carbon or boron atoms; and (iv) the bridging substituent has at least one oxygen, nitrogen, sulfur or phosphorus atom bonded to the boron atom and at least one aromatic ring.
    Type: Application
    Filed: April 22, 2016
    Publication date: May 17, 2018
    Inventors: Thomas P. Clark, David S. Laitar, Sukrit Mukhopadhyay, Aaron A. Rachford, Robert DJ Froese, David D. Devore, Bethany Neilson, Jeong-Hwan Jeon, Hong-Yeop Na
  • Publication number: 20180111940
    Abstract: The invention provides a composition comprising at least one compound of Formula 1 through Formula 8, each as described herein. These compounds, containing an imidazopyrazine moiety, are useful in organic electroluminescence devices.
    Type: Application
    Filed: June 22, 2016
    Publication date: April 26, 2018
    Inventors: Mark E. Ondari, Dean M. Welsh, Robert DJ Froese, Hong-Yeop Na
  • Publication number: 20180108845
    Abstract: A composition is provided, which comprises at least one cyclic urea compound of Formula 1, as described herein. The composition can be used in electronic devices, such as organic electroluminescent devices.
    Type: Application
    Filed: June 28, 2016
    Publication date: April 19, 2018
    Inventors: MARK E. Ondari, Robert J. Wright, Robert DJ Froese, David D. Devore, Hong-Yeop Na
  • Publication number: 20180002284
    Abstract: Organic compounds suitable for organic layers of electronic devices that show improved luminescent properties.
    Type: Application
    Filed: December 25, 2015
    Publication date: January 4, 2018
    Inventors: Zhengming Tang, Chong Xing, Shaoguang Feng, Hong-Yeop Na, Minrong Zhu, Robert J. Wright, David D. Devore
  • Publication number: 20180006236
    Abstract: Organic compounds suitable for organic layers of electronic devices that show reduced driving voltage, increased luminous efficiency and/or increased power efficiency.
    Type: Application
    Filed: December 22, 2015
    Publication date: January 4, 2018
    Inventors: Zhengming Tang, Shaoguang Feng, Hong-Yeop Na, Chong Xing, Minrong Zhu, Robert J. Wright, David D. Devore, Jichang Feng, Kyung-Joo Lee
  • Publication number: 20170334849
    Abstract: An organic compound suitable for organic layers of electronic devices that show improved luminescent properties.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 23, 2017
    Inventors: Zhengming Tang, Chong Xing, Shaoguang Feng, Minrong Zhu, Hua Ren, Hong-Yeop Na, Yuchen Liu, Robert J. Wright, David D. Devore
  • Publication number: 20170309841
    Abstract: The present invention relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising a specific combination of a plurality of host compounds, the organic electroluminescent device according to the present invention provides high efficiency and a long lifespan.
    Type: Application
    Filed: October 16, 2015
    Publication date: October 26, 2017
    Inventors: Hyun Kim, Hee-Ryong Kang, Doo-Hyeon Moon, Hyun-Ju Kang, Hong-Yeop Na, Bitnari Kim
  • Publication number: 20170279056
    Abstract: The present invention relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising a specific combination of a plurality of host compounds, the organic electroluminescent device according to the present invention provides excellent lifespan characteristics while maintaining high luminous efficiency.
    Type: Application
    Filed: August 20, 2015
    Publication date: September 28, 2017
    Inventors: Bitnari Kim, Nam-Kyun Kim, Hong-Yeop Na, Tae-Jin Lee, Kyung-Hoon Choi, Jae-Hoon Shim, Young-Jun Cho, Hee-Ryong Kang, Young-Mook Lim, Hyun-Ju Kang, Doo-Hyeon Moon, Ji-Song Jun, Hee-Choon Ahn, Young-Kwang Kim, Jin-Ri Hong
  • Publication number: 20170207398
    Abstract: The present invention relates to an electron transport material comprising a compound of a certain structure, and an organic electroluminescent device comprising the same. The organic electroluminescent device comprising the electron transport material of the present invention has a low driving voltage, high luminous efficiency and good color purity, and thus effectively shows blue emission.
    Type: Application
    Filed: July 16, 2015
    Publication date: July 20, 2017
    Inventors: Jeong-Eun Yang, Su-Hyun Lee, Chi-Sik Kim, Young-Jun Cho, Kyung-Hoon Choi, Sang-Hee Cho, Jeong-Hwan Jeon, Hong-Yeop Na
  • Publication number: 20170162801
    Abstract: The present disclosure relates to an electron buffering material, and an organic electroluminescent device comprising a first electrode, a second electrode facing the first electrode, a light-emitting layer between the first electrode and the second electrode, and an electron transport zone and an electron buffering layer between the light-emitting layer and the second electrode. The organic electroluminescent device comprising the electron buffering material of the present disclosure has a low driving voltage and excellent luminous efficiency.
    Type: Application
    Filed: June 17, 2015
    Publication date: June 8, 2017
    Inventors: Young-Jun Cho, Kyung-Hoon Choi, Sang-Hee Cho, Jae-Hoon Shim, Hong-Yeop Na
  • Publication number: 20170077415
    Abstract: The present invention relates to an organic electroluminescent device comprising an electron transport material which comprises a compound having a specific structure. The organic electroluminescent device comprising the electron transport material of the present invention provides low driving voltage, high luminous efficiency, excellent lifespan characteristics, and excellent color coordination to efficiently emit blue light.
    Type: Application
    Filed: May 8, 2015
    Publication date: March 16, 2017
    Inventors: Chi-Sik Kim, Ji-Song Jun, Young-Jun Cho, Kyung-Hoon Choi, Sang-Hee Cho, Jae-Hoon Shim, Hong-Yeop Na
  • Publication number: 20170047524
    Abstract: The present invention relates to an electron transport material and an organic electroluminescent device comprising the material in an electron transport layer. The compounds according to the present invention as an organic electron transport material have faster electron transport property compared to a conventional electron transport material. Thus, a device comprising the compounds according to the present invention shows low driving voltage, high efficiency, and excellent lifespan property. Furthermore, the electron transport compounds have excellent color coordinate, and thus are effective in blue light-emitting.
    Type: Application
    Filed: April 28, 2015
    Publication date: February 16, 2017
    Inventors: Chi-Sik Kim, Jeong-Eun Yang, Young-Jun Cho, Kyung-Hoon Choi, Sang-Hee Cho, Jae-Hoon Shim, Hong-Yeop Na
  • Publication number: 20160248020
    Abstract: The invention provides a composition comprising at least one fluorene substituted triazine derived compound of Formula 1, as described herein, and electronic devices containing the same. Such devices have improved efficiency and better driving voltage.
    Type: Application
    Filed: November 10, 2014
    Publication date: August 25, 2016
    Inventors: Mark E. Ondari, Kyoung Moo Koh, Dean M. Welsh, Tomas D. Paine, Liang Hong, Kenneth E. Stockman, Hong-Yeop Na, Kyung-Joo Lee
  • Publication number: 20150126736
    Abstract: The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention has excellent luminous efficiency, power efficiency, and lifespan characteristic. Using the compounds of the present invention, it is possible to manufacture an OLED device with a long operating lifespan. In addition, the compounds can improve the power efficiency of the device to reduce overall power consumption.
    Type: Application
    Filed: May 2, 2013
    Publication date: May 7, 2015
    Inventors: Young-Jun Cho, Ji-Song Jun, Hee-Ryong Kang, Bong-Ok Kim, Hyuck-Joo Kwon, Kyung-Joo Lee, Seon-Woo Lee, Hong-Yeop Na, Hyo-Nim Shin, Jeong-eun Yang, Soo-Jin Yang
  • Publication number: 20150112064
    Abstract: The present invention relates to a novel organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention has high green luminous efficiency and superior material lifespan characteristics, compared with conventional phosphorescent host materials, and thus can provide an organic electroluminescent device which is excellent in operational lifespan, and induces increased power efficiency and improves power consumption.
    Type: Application
    Filed: April 24, 2013
    Publication date: April 23, 2015
    Inventors: Bong-Ok Kim, Chi-Sik Kim, Jong-Seok Ku, Hyuck-Joo Kwon, Kyung-Joo Lee, Hong-Yeop Na