ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,557,543, issued on Feb. 17, was assigned to BEIJING SUMMER SPROUT TECHNOLOGY Co. LTD. (Beijing).
"Light-emitting material with a polycyclic ligand" was invented by Cuifang Zhang (Beijing), Qi Zhang (Beijing), Nannan Lu (Beijing), Zhihong Dai (Beijing), Chi Yuen Raymond Kwong (Beijing) and Chuanjun Xia (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a light-emitting material with polycyclic ligand. The light-emitting material is a metal complex with polycyclic ligand may be used as a light-emitting material in an electroluminescent device. While maintaining a very narrow FWHM, these novel metal complexes can better adjust the light-em...