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Electronic Transport Characterization of BiVO4 Using AC Field Hall Technique

Published online by Cambridge University Press:  03 March 2014

Jeffery Lindemuth ,
Alexander J. E. Rettie ,
Luke G. Marshall ,
Jianshi Zhou  and
C. Buddie Mullins
Jeffery Lindemuth
Affiliation:
Lake Shore Cryotronics, Westerville Ohio 43082 (USA)
Alexander J. E. Rettie
Affiliation:
McKetta Department of Chemical Engineering, The University of Texas at Austin, TX 78712 (USA)
Luke G. Marshall
Affiliation:
Materials Science and Engineering Program, Texas Materials Institute, Department of Mechanical Engineering, The University of Texas at Austin, TX 78712 (USA)
Jianshi Zhou
Affiliation:
Materials Science and Engineering Program, Texas Materials Institute, Department of Mechanical Engineering, The University of Texas at Austin, TX 78712 (USA)
C. Buddie Mullins
Affiliation:
McKetta Department of Chemical Engineering, The University of Texas at Austin, TX 78712 (USA) Center for Electrochemistry, Department of Chemistry and Biochemistry, The University of Texas at Austin, TX 78712 (USA) Materials Science and Engineering Program, Texas Materials Institute, Department of Mechanical Engineering, The University of Texas at Austin, TX 78712 (USA)
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Abstract

Bismuth vanadate (BiVO4) is a photoelectrode for the oxidation of water. It is of fundamental importance to understand the electrical and photoelectrochemical properties of this material. In metal oxides, the electronic transport is described by the small polaron model, first described by Mott. In this model, the resistivity varies with temperature as $\rho \,\left( T \right)\, \propto \,Te^{({{E_a } \mathord{\left/ {\vphantom {{E_a } {(k_B T))}}} \right. \kern-\nulldelimiterspace} {(k_B T))}}} $, where Ea is the hopping activation energy, kB is the Boltzmann constant and T is the absolute temperature. Resistivity measurements confirm that small polaron hopping dominates in temperature ranges from 250 K to 300 K. In addition measurements from 175K to 250K show the variable range hopping dominates the transport. To this end, the electronic transport properties of BiVO4 single crystal were characterized using resistivity measurements and Hall effect measurements over temperatures ranging from 175 K to 300 K.

Keywords

Bielectronic materialV
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1633: Symposium R – Oxide Semiconductors , 2014 , pp. 43 - 49
Copyright
Copyright © Materials Research Society 2014 

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