Majority carrier transport in single crystal rutile nanowire arrays

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DOIResolve DOI: http://doi.org/10.1002/pssr.201308296
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TypeArticle
Journal titlePhysica Status Solidi - Rapid Research Letters
ISSN1862-6254
AbstractMonocrystalline n-TiO2 nanowires of the rutile phase (Rtl-NWs) grown by a scalable hydrothermal method constitute a functional oxide nanomaterial with potential applications in photovoltaics, photocatalysts, field emitters and electrochemical battery anodes. Carrier transport in Rtl-NWs is of fundamental importance but has hitherto been inferred indirectly via impedance and intensity-modulated spectroscopic techniques. We report an effective electron drift mobility of 1.95 × 10-5 cm2 V-1 s-1 in rutile nanowire arrays directly measured using the time-of-flight (TOF) and space charge limited current techniques. In addition, we measure an equilibrium free electron concentration of ∼1014 cm-3 and a trap density of 3.5 × 1016 cm-3 in rutile nanowires. These results point to the importance of reducing traps to improve charge transport in rutile nanowires. Transient photocurrents in rutile nanowires. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology (NINT-INNT)
Peer reviewedYes
NPARC number21270772
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Record identifier27a3aa37-3f6a-4b03-98b3-2796c4155819
Record created2014-02-17
Record modified2016-05-09
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