Science Daily April 14, 2022
Graphene-hBN structures can power LEDs that generate deep-UV light, which is impossible in today’s LEDs. Previous efforts to get ordered rows of hBN atoms that align with the graphene underneath were not successful. A team of researchers in the US (University of Michigan, Ohio State University, Yale University) discovered that neat rows of hBN atoms are more stable at high temperature than the undesirable jagged formations. They used a terraced graphene substrate and heated it to around 1600 degrees Celsius before spraying on individual boron and active nitrogen atoms resulting in neatly ordered seams of hBN on the graphene’s terraced edges, which expanded into wide ribbons of material. The work provides a viable path for the controlled synthesis of ultraclean, wafer–scale, atomically ordered 2D quantum materials, as well as the fabrication of 2D quantum electronic and optoelectronic devices…read more. TECHNICAL ARTICLEÂ