The influence of Ti and Si doping on the structure, morphology and photo-response properties of α-Fe2O3 for efficient water splitting: experiment and first-principle calculations
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|Title:||The influence of Ti and Si doping on the structure, morphology and photo-response properties of α-Fe2O3 for efficient water splitting: experiment and first-principle calculations||Authors:||Rahman, Mahfujur
English, Niall J.
MacElroy, J. M. Don
|Permanent link:||http://hdl.handle.net/10197/5226||Date:||30-Jan-2014||Online since:||2014-01-13T12:23:56Z||Abstract:||Ti- and Si- doping effects on morphology, structure, optical and photo-response of α-Fe2O3 nanoscale coatings from atmospheric-pressure chemical vapour deposition (APCVD) have been studied. Si- and Ti-doping led to larger clusters with finer grains and smaller clusters with larger grains, respectively. Photocurrent performance was increased remarkably by doping, especially Si. Excellent agreement was found for band gaps and optical properties compared to hybrid-Density Functional Theory. Substitutional replacement of Fe by Si shrinks the volume more than Ti-doping; it is conjectured that this affects hopping probability of localised charge-carriers more and leads to enhanced photocurrent activity for Si-doping, supported by experiment.||Funding Details:||Science Foundation Ireland||Type of material:||Journal Article||Publisher:||Elsevier||Journal:||Chemical Physics Letters||Volume:||592||Issue:||30 January 2014||Start page:||242||End page:||246||Copyright (published version):||2013 Published by Elsevier B.V.||Keywords:||Photocurrent; Density functional theory; Optical properties||DOI:||10.1016/j.cplett.2013.12.021||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Chemical and Bioprocess Engineering Research Collection|
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