ALEXANDRIA, Va., March 17 -- United States Patent no. 12,581,854, issued on March 17, was assigned to SFC Co. LTD. (Cheongju-si, South Korea).
"Organic light emitting diode for high efficiency" was invented by Soon-Wook Cha (Goyang, South Korea), Young-Hwan Park (Cheongju, South Korea), Seo-Yeon Yoon (Seongnam, South Korea) and So Young Shim (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an organic light-emitting diode, comprising: a first electrode, a second electrode opposite the first electrode, and a light-emitting layer and an electron-density-controlling layer in that order between the first electrode and the second electrode, wherein the electron-density-contr...