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Calculations of strain-modified anataseTiO2band structures
Abstract
In order to theoretically quantify a strain-inducing method that we use to engineer the material properties of anatase titania, we studied its electronic band structure over a range of biaxial strain by utilizing both the density functional theory within the generalized gradient approximation (GGA) and quasiparticle theory calculations within the GW approximation. This strain-modified material is suitable for use as a high efficiency photoanode in a photoelectrochemical cell. We track the changes to the band gap and the charge carrier effective masses versus the total pressure associated with the strained lattice. Both the GGA and the GW approximation predict a linear relationship between the change in band gap and the total pressure. However, the GGA underestimates the slope by more than 57% with respect to the GW approximation result of 0.0685 eV/GPa. We also compare our predicted band gap shift to a reported experimental result.
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Electronic Structure: Basic Theory and Practical Methods
Martin, R. M. (2004) · doi:10.1017/cbo9780511805769 · Cited by 1,752
Cited by
Why is anatase a better photocatalyst than rutile? - Model studies on epitaxial TiO2 films
Luttrell, T., Halpegamage, S., Tao, J., Kramer, A., Sutter, E., & Batzill, M. (2014) · Scientific Reports · doi:10.1038/srep04043 · Cited by 1,544
Metadata
- Authors
- Thulin, L., & Guerra, J.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2008-05-14
- Volume
- 77
- Issue
- 19
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W2044673372
- Cited by
- 175
- References
- 1
- FWCI
- 4.15
- Type
- journal article
- Language
- en
- Open access
- closed
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- Thulin, L., & Guerra, J. (2008). Calculations of strain-modified anataseTiO2band structures. Physical Review B. https://doi.org/10.1103/physrevb.77.195112
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