ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,640, issued on March 18, was assigned to CITY UNIVERSITY OF HONG KONG (Kowloon, Hong Kong).
"Phosphors based on carbene metal complex" was invented by Yun Chi (Kowloon, Hong Kong), Yi Yuan (Kowloon, Hong Kong) and Caifa You (Kowloon, Hong Kong).
According to the abstract* released by the U.S. Patent & Trademark Office: "This invention relates to an iridium metal complex. The iridium metal complex comprises no more than three 1,3-dihydro-2H-benzo[d]imidazol-2-ylidene based carbene cyclometalate ligands. The iridium metal complex provides a blue emission. This is useful for organic light emitting diode (OLED) components where blue emitters have trailed behind the advances 5 of red...