VerLASE Technologies a subsdiary of Versatillis of Winooski, Vermont USA, reported that the U.S. Patent Office has issued US Patent No. 8,859,412.The patent relates to the use of certain 2D materials to grow semiconductor structures that can emit light in green to red colors. Verlase has been working with II-VI materials that can directly emit colors in green/yellow gap where Gallium Nitride LEDs with conventional phosphors cannot. VerLASE says its II-VI materials are more robust and have fewer defects than conventional QD materials because they have attained the Wurtzite phase of growth using certain 2D materials as templates. The company asserts its growth method overcomes the reduced efficiency, temperature sensitivity, brightness degradation, reduced lifetimes, and other issues of conventional II-VI QD materials.
“This is a key innovation for several important applications,” stated Professor Maria Tamargo, professor of chemistry at the City College of the City University of New York, and, adding that “VerLASE has shown for the first time a novel, commercially feasible way to grow Wurtzite phase II-VI crystal films, a focus area of research worldwide”
“As exciting as this is, further patents are in the pipeline – we are actively exploring with several leading OEMs how to replace phosphors,” stated company CEO George Powch,
The company reports that it is further working with its sister company, VersufleX to show exfoliated 2D materials as the active layer in novel, electrically pumped LEDs, and in optically pumped devices.