Modification of Photoconductivity Spectra in ZnO–CdSe Quantum- Dot Composites upon Exposure to Additional Photoexcitation

The incorporation of CdS nanocrystals into a porous ZnO matrix results in sensitization of the composite in the visible spectral region. Studies of the photoconductivity spectra upon variable external illumination show that the spectra undergo reversible transformations. It is shown that the shape o...

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Bibliographic Details
Published inSemiconductors (Woodbury, N.Y.) Vol. 52; no. 7; pp. 902 - 906
Main Authors Drozdov, K. A., Krylov, I. V., Chizhov, A. S., Rumyantseva, M. N., Ryabova, L. I., Khokhlov, D. R.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.07.2018
Springer Nature B.V
Subjects
CADMIUM SELENIDES
CADMIUM SULFIDES
Composite Semiconductors
Incident radiation
Magnetic Materials
Magnetism
MATERIALS SCIENCE
Microcrystalline
Nanocrystalline
Nanocrystals
PHOTOCONDUCTIVITY
Photoexcitation
Physics
Physics and Astronomy
Porous
POROUS MATERIALS
Porous media
QUANTUM DOTS
Spectra
VISIBLE SPECTRA
Zinc oxide
ZINC OXIDES
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Summary:The incorporation of CdS nanocrystals into a porous ZnO matrix results in sensitization of the composite in the visible spectral region. Studies of the photoconductivity spectra upon variable external illumination show that the spectra undergo reversible transformations. It is shown that the shape of the peak and the position of the local photoconductivity maximum corresponding to nanocrystals depend on the wavelength distribution of the incident radiation intensity. The mechanisms responsible for the process are discussed.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782618070059