Revealing Interface-Assisted Charge-Transfer Mechanisms by Using Silicon Nanowires as Local Probes

Authors

  • Jindong Wang,

    1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (P. R. China)
    Search for more papers by this author
    • These authors contributed equally to this work.

  • Zhenxing Wang,

    1. Center for NanoChemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China)
    Search for more papers by this author
    • These authors contributed equally to this work.

  • Qiaochu Li,

    1. Center for NanoChemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China)
    Search for more papers by this author
  • Lin Gan,

    1. Center for NanoChemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China)
    Search for more papers by this author
  • Xinjun Xu,

    1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (P. R. China)
    Search for more papers by this author
  • Prof. Lidong Li,

    Corresponding author
    1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (P. R. China)
    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (P. R. China)
    Search for more papers by this author
  • Prof. Xuefeng Guo

    Corresponding author
    1. Center for NanoChemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China)
    • Center for NanoChemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China)
    Search for more papers by this author

  • We thank Yabing Qi (OIST (Japan)) for enlightening discussions. We acknowledge primary financial support from MOST (2012CB921404) and the NSFC (21225311, 51121091, 2112016, 90923015 and 21003002).

Abstract

original image

A semiconductor/environment interface has been formed in which suspended silicon nanowires (SiNWs) are in direct contact with photoactive TiO2 quantum dots. The photoactivity of TiO2 competes with the intrinsic photoresponses of p-type silicon nanowires. Rational control of the competitive mechanism realizes remarkable mirror-imaging photo-switching and superior rectifying effects in a single SiNW-based device.

Ancillary