Projects per year
Abstract
Wide-bandgap semiconductors are exploited in several technological fields such as electron emission devices, energy conversion, high-power high-temperature electronics, and electrocatalysis. Their electronic properties vary significantly depending on the functionalization of the surface. Here, we investigated as a proof-of-concept the modulation of the electronic properties of one of the most common wide-bandgap semiconductors, that is, diamonds, to show the tunability of their properties by modifying the surface termination. Photoelectron spectroscopy was used to demonstrate the availability of a wide window of band bending, work function, and electron affinity. The band bending and work function were found to change by up to 360 meV and 2 eV, respectively, by varying the surface from hydrogen- to oxygen-terminated. Because of the negative electron affinity of diamonds, we were able to experimentally show the rigid shift of the whole band structure.
Original language | English |
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Pages (from-to) | 4168-4177 |
Journal | Journal of Physical Chemistry C |
Volume | 123 |
Issue number | 7 |
Early online date | 21 Jan 2019 |
DOIs | |
Publication status | Published - 21 Feb 2019 |
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Projects
- 1 Finished
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NanoESCA II: NanoESCA-Electron Spectroscopy for Chemical Analysis imaged at the Nanoscale (full application)
1/05/15 → 30/04/20
Project: Research
Equipment
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Bristol University NanoESCA Laboratory (BrUNEL)
Neil Fox (Manager) & Mattia Cattelan (Manager)
School of ChemistryFacility/equipment: Facility