ALEXANDRIA, Va., May 5 -- United States Patent no. 12,620,781, issued on May 5, was assigned to KING SAUD UNIVERSITY (Riyadh, Saudi Arabia).

"Perovskite-based white or multi-wavelength laser" was invented by Saif Mabkhot Qaid (Riyadh, Saudi Arabia), Sanad Abdullah Alsulaiman (Riyadh, Saudi Arabia) and Abdullah Saleh Aldwayyan (Riyadh, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for manufacturing an optoelectronic device using halide perovskite layers includes providing a substrate; optionally depositing a first spacer layer on the substrate; depositing a first emission layer on the first spacer layer, if present, or on the substrate; depositing a second spacer layer on the first emis...