Majority carrier transport in single crystal rutile nanowire arrays

• Author(s) / Creator(s)

  • Mohammadpour, Arash
  • Farsinezhad, Samira
  • Wiltshire, Benjamin D.
  • Shankar, Karthik

• Monocrystalline 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 electro-chemical battery anodes. Carrier transport in Rtl-NWs is of fundamental importance but has hitherto been inferred in-directly via impedance and intensity-modulated spectro-scopic techniques. We report an effective electron drift mobility of 1.95 x 10^-5 cm2 V-1s-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 ~10^14 cm-3 and a trap density of 3.5 x 10^16 cm-3 in rutile nanowires. These results point to the importance of reducing traps to improve charge transport in rutile nanowires.

• Date created

  2013-11-27

• Subjects / Keywords

  • solvothermal
  • photoconductivity
  • photoelectrochemical solar cells
  • electrical transient

• Type of Item

  Article (Draft / Submitted)

• DOI

  https://doi.org/10.7939/r3-wnvt-k063

• License

  Attribution-NonCommercial 4.0 International