Size-dependent conductivity type inversion in CU2O nanoparticles

B. Balamurugan, I. Aruna, B. R. Mehta, S. M. Shivaprasad

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

X-ray photoemission spectroscopy and optical absorption studies have been carried out on Cu2O nanoparticles prepared using the activated reactive evaporation technique. A strong shift of the valence band edge (from 0.7 to 1.8 eV) has been observed on reduction of the nanoparticle size from 20 nm to 4 nm. The size-dependent modifications in the energy level diagram and metal-Cu2O nanoparticle Schottky junction characteristics confirm the observation of the inversion of conductivity type from p-type bulk conductivity to n-type conductivity in Cu2O nanoparticles at lower dimensions. This study can initiate a further methodology for tailoring the semiconductor properties of a material by controlling the nanoparticle size.

Original languageEnglish
Article number165419
JournalPhysical Review B (Condensed Matter)
Volume69
Issue number16
DOIs
Publication statusPublished - 29 Apr 2004

Fingerprint

inversions
Nanoparticles
conductivity
nanoparticles
Metal nanoparticles
Photoelectron spectroscopy
Valence bands
X ray spectroscopy
Light absorption
Electron energy levels
Evaporation
Semiconductor materials
absorption spectroscopy
optical absorption
photoelectric emission
energy levels
diagrams
evaporation
methodology
valence

Keywords

  • photoemission spectroscopy
  • Cu2O nanoparticles
  • nanoparticle conductivity

Cite this

Balamurugan, B. ; Aruna, I. ; Mehta, B. R. ; Shivaprasad, S. M. / Size-dependent conductivity type inversion in CU2O nanoparticles. In: Physical Review B (Condensed Matter). 2004 ; Vol. 69, No. 16.
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Size-dependent conductivity type inversion in CU2O nanoparticles. / Balamurugan, B.; Aruna, I.; Mehta, B. R.; Shivaprasad, S. M.

In: Physical Review B (Condensed Matter), Vol. 69, No. 16, 165419, 29.04.2004.

Research output: Contribution to journalArticle

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