Patents by Inventor Sang-He Cho

Sang-He Cho 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).

  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20190067593
    Abstract: The present invention relates to an organic EL device comprising an electron buffer material, and a first electrode, a second electrode opposing the first electrode, a light-emitting layer disposed between the two electrodes, and an electron transport zone and an electron buffer layer disposed between the light-emitting layer and the second electrode. By using an electron buffer material according to the present invention, the organic EL device having low driving voltage, high luminous efficiency, and excellent lifespan can be provided.
    Type: Application
    Filed: March 15, 2016
    Publication date: February 28, 2019
    Inventors: Sang He Cho, Hong Yeop Na, Zhengming Tang, Shaoguang Feng, Doo-Hyeon Moon
  • ELECTRON BUFFERING MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20170117485
    Abstract: The present invention relates to an electron buffering material and an organic electroluminescent device comprising the same in an electron buffer layer. It is possible to provide an organic electroluminescent device having excellent luminous efficiency and lifespan characteristics by using the electron buffering material according to the present invention.
    Type: Application
    Filed: March 17, 2015
    Publication date: April 27, 2017
    Applicant: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Sang-He Cho, Jeong-Hwan Jeon, Hong-Yoep Na, Ji-Song Jun, Jae-Hoon Shim, Kyung-Hoon Choi, Chi-Sik Kim, Young-Jun Cho
  • ELECTRON BUFFERING MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20170005276
    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, excellent luminous efficiency, and long lifespan.
    Type: Application
    Filed: March 17, 2015
    Publication date: January 5, 2017
    Applicants: Rohm and Haas Electronic Materials Korea Ltd., Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Chi-Sik Kim, Hyo-Jung Lee, Su-Hyun Lee, Ji-Song Jun, Jeong-Eun Yang, Jae-Hoon Shim, Kyung-Hoon Choi, Young-Jun Cho, Jeong-Hwan Jeon, Hong-Yoep Na, Sang-He Cho