Electronic structure and hot carrier relaxation in 001 anatase TiO 2 nanowire

Shuping Huang, Dmitri S. Kilin

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

We present an electronic structure and non-adiabatic excited state dynamics study of <001> anatase TiO2 nanowire (NW) by combining density matrix formalism and ab initio electronic structure calculations. Our results show that quantum confinement increases the energy gap as the dimension of TiO2 is reduced from the bulk to a NW with a diameter of several nanometres and that the probability of electronic transitions induced by lattice vibrations for the NW follows band gap law. The electron non-radiative relaxation to the bottom of the conduction band is involving Ti 3d orbitals, while the hole non-radiative relaxation of holes to the top of the valence band occurs by subsequent occupation of O 2p orbitals.

Original languageEnglish (US)
Pages (from-to)539-545
Number of pages7
JournalMolecular Physics
Volume112
Issue number3-4
DOIs
StatePublished - Feb 16 2014

Keywords

  • Electronic structure
  • Non-adiabatic dissipative dynamics
  • Quantum confinement
  • TiO nanowires

Fingerprint Dive into the research topics of 'Electronic structure and hot carrier relaxation in 001 anatase TiO <sub>2</sub> nanowire'. Together they form a unique fingerprint.

Cite this