Journal
JOURNAL OF APPLIED PHYSICS
Volume 111, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3699016
Keywords
-
Categories
Funding
- U.S. Department of Energy [DE-AC36-08GO28308]
- Ohio Research Scholar Program (ORSP)
Ask authors/readers for more resources
Using a combination of density functional theory calculation and materials synthesis and characterization we examine the properties of charge-compensated Ti and Mg co-alloyed hematite thin films for the application of photoelectrochemical (PEC) water splitting. We find that the charge-compensated co-alloying results in the following effects: (1) It enhances the solubility of Mg and Ti, which leads to reduced electron effective mass and therefore increased electron mobility; (2) It tunes the carrier density and therefore allows the optimization of electrical conductivity; and (3) It reduces the density of charged defects and therefore reduces carrier recombination. As a result, the Ti and Mg co-alloyed hematite thin films exhibit improved water oxidation photocurrent magnitudes as compared to pure hematite thin films. Our results suggest that charge-compensated co-alloying is a plausible approach for engineering hematite for the application of PEC water splitting. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3699016]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available