US Patent Issued to IDEMITSU KOSAN on Oct. 7 for "Organic electroluminescent element and electronic appliance" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,269, issued on Oct. 7, was assigned to IDEMITSU KOSAN Co. LTD. (Tokyo).

"Organic electroluminescent element and electronic appliance" was invented by Takushi Shiomi (Chiyoda-ku, Japan), Keiichi Yasukawa (Chiyoda-ku, Japan), Hiromi Nakano (Chiyoda-ku, Japan) and Toshinari Ogiwara (Chiyoda-ku, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An organic electroluminescence device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode. The emitting layer comprises a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom. A singlet energy S1(M2) of...