Exciton and core-level electron confinement effects in transparent ZnO thin films

Adolfo A. Mosquera; David Horwat; Alexandr Rashkovskiy; Anatoly Kovalev; Patrice Miska; Dmitry Wainstein; Jose M. Albella; Jose L. Endrino

doi:10.1038/srep01714

Exciton and core-level electron confinement effects in transparent ZnO thin films

Adolfo A. Mosquera, David Horwat, Alexandr Rashkovskiy, Anatoly Kovalev, Patrice Miska, Dmitry Wainstein, Jose M. Albella, Jose L. Endrino

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Abstract

The excitonic light emission of ZnO films have been investigated by means of photoluminescence measurements in ultraviolet-visible region. Exciton confinement effects have been observed in thin ZnO coatings with thickness below 20 nm. This is enhanced by a rise of the intensity and a blue shift of the photoluminescence peak after extraction of the adsorbed species upon annealing in air. It is found experimentally that the free exciton energy (determined by the photoluminescence peak) is inversely proportional to the square of the thickness while core-level binding energy is inversely proportional to the thickness. These findings correlate very well with the theory of kinetic and potential confinements.

Original language	English
Article number	1714
Journal	Scientific Reports
Volume	3
DOIs	https://doi.org/10.1038/srep01714
State	Published - 1 Jan 2013
Externally published	Yes

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title = "Exciton and core-level electron confinement effects in transparent ZnO thin films",

abstract = "The excitonic light emission of ZnO films have been investigated by means of photoluminescence measurements in ultraviolet-visible region. Exciton confinement effects have been observed in thin ZnO coatings with thickness below 20 nm. This is enhanced by a rise of the intensity and a blue shift of the photoluminescence peak after extraction of the adsorbed species upon annealing in air. It is found experimentally that the free exciton energy (determined by the photoluminescence peak) is inversely proportional to the square of the thickness while core-level binding energy is inversely proportional to the thickness. These findings correlate very well with the theory of kinetic and potential confinements.",

author = "Mosquera, {Adolfo A.} and David Horwat and Alexandr Rashkovskiy and Anatoly Kovalev and Patrice Miska and Dmitry Wainstein and Albella, {Jose M.} and Endrino, {Jose L.}",

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doi = "10.1038/srep01714",

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T1 - Exciton and core-level electron confinement effects in transparent ZnO thin films

AU - Mosquera, Adolfo A.

AU - Horwat, David

AU - Rashkovskiy, Alexandr

AU - Kovalev, Anatoly

AU - Miska, Patrice

AU - Wainstein, Dmitry

AU - Albella, Jose M.

AU - Endrino, Jose L.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - The excitonic light emission of ZnO films have been investigated by means of photoluminescence measurements in ultraviolet-visible region. Exciton confinement effects have been observed in thin ZnO coatings with thickness below 20 nm. This is enhanced by a rise of the intensity and a blue shift of the photoluminescence peak after extraction of the adsorbed species upon annealing in air. It is found experimentally that the free exciton energy (determined by the photoluminescence peak) is inversely proportional to the square of the thickness while core-level binding energy is inversely proportional to the thickness. These findings correlate very well with the theory of kinetic and potential confinements.

AB - The excitonic light emission of ZnO films have been investigated by means of photoluminescence measurements in ultraviolet-visible region. Exciton confinement effects have been observed in thin ZnO coatings with thickness below 20 nm. This is enhanced by a rise of the intensity and a blue shift of the photoluminescence peak after extraction of the adsorbed species upon annealing in air. It is found experimentally that the free exciton energy (determined by the photoluminescence peak) is inversely proportional to the square of the thickness while core-level binding energy is inversely proportional to the thickness. These findings correlate very well with the theory of kinetic and potential confinements.

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DO - 10.1038/srep01714

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SN - 2045-2322

VL - 3

JO - Scientific Reports

JF - Scientific Reports

M1 - 1714

ER -

Exciton and core-level electron confinement effects in transparent ZnO thin films

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