UNIST Scientists Grow Atomically Thin semiconducting Oxide on Graphene


UNIST Scientists Grow Atomically Thin semiconducting Oxide on Graphene

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By Dr. Zina Jarrahi Cinker
NGA Executive Director

UNIST has introduced a new method to fabricate the world’s thinnest oxide semiconductor. This heterostructure is formed by directly growing a single-atom-thick zinc oxide layer on top of graphene through atomic layer deposition.

This graphic displays the growth of ZnO on graphene layer, consists of interconnected hexagons of carbon atoms. Zinc atom shown as red spheres, oxygen atom as green spheres. Credit: UNIST.

The bandgap of the monolayer ZnO is experimentally determined to be ~ 4.0 eV which is quite large and will in turn help with reducing noise and leakage current in devices.

“The heteroepitaxial stack of the thinnest 2D oxide semiconductors on graphene has potential for future optoelectronic device applications associated with high optical transparency and flexibility. Flexible, high-performance devices are indispensable for conventional wearable electronics, which have been attracting attention recently. With this new material, we can achieve truly high-performance flexible devices,” said professor Lee, the lead Materials Scientist at UNIST.

More information: Hyo-Ki Hong et al, Atomic Scale Study on Growth and Heteroepitaxy of ZnO Monolayer on Graphene, Nano Letters (2017). DOI: 10.1021/acs.nanolett.6b03621

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Dr. Zina Jarrahi Cinker is a graphene scientist and technology developer. As a consultant and entrepreneur in the field of graphene, she has multi-faceted experience and a deep understanding of the graphene market, the supply chain and the challenges involved in the commercialization process. As the Executive Director of the National Graphene Association, Zina oversees the direction, focus and operation of the organization. She received her Ph.D. and post-doctoral experience in the field of graphene optoelectronics and ultrafast spectroscopy and maintains a position as a visiting scientist at the department of physics and astronomy at Vanderbilt University. She previously served as the CTO and founder of G.Element, a consulting and application development company in the graphene composite sector.


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