A novel synthesis technique provides a method for direct growth of wafer-scale single-crystal 2D semiconductors on a variety of substrates, potentially paving a new path towards next generation devices.
The work, published in the journal Nature, presents an entirely new growth technique called hypotaxy which leverages 2D materials as a template to guide TMD crystal alignment. The method holds immense potential thanks to its ability to grow single-crystal TMDs at low temperatures allowing it to have full compatibility with current manufacturing processes. Additionally, hypotaxy allows precise control of the metal film thickness which allows for the full regulation of the number of TMD layers.
Along with a streamlined manufacturing approach hypotaxy also boosts improved semiconductor charger carrier mobility and excellent uniformity, hinting at its ability to contribute to the development of high-performance next generation 2D semiconductor devices.
"The hypotaxy technique that we have developed overcomes the limitations of epitaxy, a concept first proposed in the 1930s and a fundamental pillar of modern electronic device development." Said Professor Gwan-Hyoung Lee, who led the research. "Since hypotaxy enables 3D integration, which is essential for next-generation AI semiconductors, I expect it will establish itself as a revolutionary approach in materials engineering."
"The greatest challenge was breaking away from the conventional perception of epitaxy, which has been the standard for synthesizing various high-quality materials." Added Donghoon Moon, the first author of the paper. "Just as hypotaxy emerged from a counterintuitive perspective on epitaxy, I hope this achievement serves as a catalyst for groundbreaking research in areas such as new material development and the synthesis of novel lattice structures."