Specific features of the optical and photoelectric properties of nanocrystalline indium oxide

Journal Article · Tue Sep 15 04:00:00 EDT 2015 · Semiconductors

DOI:https://doi.org/10.1134/S1063782615090109· OSTI ID:22469804

Forsh, P. A.; Kashkarov, P. K. ^[1]

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1. 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, Journal Name: Semiconductors Journal Issue: 9 Vol. 49; ISSN SMICES; ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTRA
ENERGY GAP
FILMS
ILLUMINANCE
INDIUM OXIDES
MONOCRYSTALS
NANOSTRUCTURES
PHOTOCONDUCTIVITY
RELAXATION
SAMPLE PREPARATION
SOL-GEL PROCESS
STEADY-STATE CONDITIONS
TEMPERATURE RANGE 0273-0400 K