Specific features of the optical and photoelectric properties of nanocrystalline indium oxide
- National Research Centre “Kurchatov Institute” (Russian Federation)
The spectral dependences of the absorption coefficient and steady-state photoconductivity and the relaxation of photoconductivity (after illumination switch off) in nanocrystalline indium oxide (In{sub 2}O{sub 3}) films synthesized by the sol–gel method are investigated. The mean nanocrystal size varies from 7–8 to 39–41 nm, depending on the sample-preparation conditions. The optical band gap of nanocrystalline In{sub 2}O{sub 3} is determined as a result of combined analysis of the optical absorption spectra and the spectral dependence of the photoconductivity. The optical band gap in nanocrystalline In{sub 2}O{sub 3} is found to be much narrower than the optical band gap in In{sub 2}O{sub 3} single crystals. The photoconductivity decay kinetics in nanocrystalline In{sub 2}O{sub 3} in air, vacuum, and argon at room temperature are studied. A model explaining the observed photoconductivity decay is proposed.
- OSTI ID:
- 22469804
- Journal Information:
- Semiconductors, Vol. 49, Issue 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7826
- Country of Publication:
- United States
- Language:
- English
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