US Patent Issued to Semiconductor Energy Laboratory on March 11 for "Light-emitting element, light-emitting device, electronic appliance, and lighting device" (Japanese Inventors)

ALEXANDRIA, Va., March 12 -- United States Patent no. 12,250,884, issued on March 11, was assigned to Semiconductor Energy Laboratory Co. Ltd. (Japan).

"Light-emitting element, light-emitting device, electronic appliance, and lighting device" was invented by Hiromi Seo (Kanagawa, Japan), Satoshi Seo (Kanagawa, Japan) and Satoko Shitagaki (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an...