Defect chemistry and defect engineering of TiO2-based semiconductors for solar energy conversion

Janusz Nowotny, Mohammad Abdul Alim, Tadeusz Bak, Mohammad Asri Idris, Mihail Ionescu, Kathryn Prince, Mohd Zainizan Sahdan, Kamaruzzaman Sopian, Mohd Asri Mat Teridi, Wolfgang Sigmund

Research output: Contribution to journalArticle

111 Citations (Scopus)

Abstract

This tutorial review considers defect chemistry of TiO2 and its solid solutions as well as defect-related properties associated with solar-to-chemical energy conversion, such as Fermi level, bandgap, charge transport and surface active sites. Defect disorder is discussed in terms of defect reactions and the related charge compensation. Defect equilibria are used in derivation of defect diagrams showing the effect of oxygen activity and temperature on the concentration of both ionic and electronic defects. These defect diagrams may be used for imposition of desired semiconducting properties that are needed to maximize the performance of TiO2-based photoelectrodes for the generation of solar hydrogen fuel using photo electrochemical cells (PECs) and photocatalysts for water purification. The performance of the TiO2-based semiconductors is considered in terms of the key performance-related properties (KPPs) that are defect related. It is shown that defect engineering may be applied for optimization of the KPPs in order to achieve optimum performance.

Original languageEnglish
Pages (from-to)8424-8442
Number of pages19
JournalChemical Society Reviews
Volume44
Issue number23
DOIs
Publication statusPublished - 7 Dec 2015

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Energy conversion
Solar energy
Semiconductor materials
Defects
Photoelectrochemical cells
Hydrogen fuels
Photocatalysts
Fermi level
Purification
Charge transfer
Solid solutions
Energy gap
Oxygen
Water

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Nowotny, J., Alim, M. A., Bak, T., Idris, M. A., Ionescu, M., Prince, K., ... Sigmund, W. (2015). Defect chemistry and defect engineering of TiO2-based semiconductors for solar energy conversion. Chemical Society Reviews, 44(23), 8424-8442. https://doi.org/10.1039/c4cs00469h

Defect chemistry and defect engineering of TiO2-based semiconductors for solar energy conversion. / Nowotny, Janusz; Alim, Mohammad Abdul; Bak, Tadeusz; Idris, Mohammad Asri; Ionescu, Mihail; Prince, Kathryn; Sahdan, Mohd Zainizan; Sopian, Kamaruzzaman; Mat Teridi, Mohd Asri; Sigmund, Wolfgang.

In: Chemical Society Reviews, Vol. 44, No. 23, 07.12.2015, p. 8424-8442.

Research output: Contribution to journalArticle

Nowotny, J, Alim, MA, Bak, T, Idris, MA, Ionescu, M, Prince, K, Sahdan, MZ, Sopian, K, Mat Teridi, MA & Sigmund, W 2015, 'Defect chemistry and defect engineering of TiO2-based semiconductors for solar energy conversion', Chemical Society Reviews, vol. 44, no. 23, pp. 8424-8442. https://doi.org/10.1039/c4cs00469h
Nowotny, Janusz ; Alim, Mohammad Abdul ; Bak, Tadeusz ; Idris, Mohammad Asri ; Ionescu, Mihail ; Prince, Kathryn ; Sahdan, Mohd Zainizan ; Sopian, Kamaruzzaman ; Mat Teridi, Mohd Asri ; Sigmund, Wolfgang. / Defect chemistry and defect engineering of TiO2-based semiconductors for solar energy conversion. In: Chemical Society Reviews. 2015 ; Vol. 44, No. 23. pp. 8424-8442.
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