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Proceedings Paper

Electronic structure characterization and bandgap engineering of solar hydrogen materials
Author(s): Jinghua Guo
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Paper Abstract

Bandgap, band edge positions as well as the overall band structure of semiconductors are of crucial importance in photoelectrochemical and photocatalytic applications. The energy position of the band edge level can be controlled by the electronegativity of the dopants, the pH of the solution (flatband potential variation of 60 mV per pH unit), as well as by quantum confinement effects. Accordingly, band edges and bandgap can be tailored to achieve specific electronic, optical or photocatalytic properties. Synchrotron radiation with photon energy at or below 1 keV is giving new insight into such areas as condensed matter physics and extreme ultraviolet optics technology. In the soft x-ray region, the question tends to be, what are the electrons doing as they migrated between the atoms. In this paper, I will present a number of soft x-ray spectroscopic study of nanostructured 3d metal compounds Fe2O3 and ZnO.

Paper Details

Date Published: 11 September 2007
PDF: 9 pages
Proc. SPIE 6650, Solar Hydrogen and Nanotechnology II, 66500F (11 September 2007); doi: 10.1117/12.734618
Show Author Affiliations
Jinghua Guo, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 6650:
Solar Hydrogen and Nanotechnology II
Jinghua Guo, Editor(s)

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