Title Exciton and core-level electron confinement effects in transparent ZnO thin films
Authors Mosquera A.A. , Horwat D. , Rashkovskiy A. , Kovalev A. , Miska P. , Wainstein D. , Albella J.M. , ENDRINO ARMENTEROS, JOSÉ LUIS
External publication Si
Means Sci. Rep.
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 5.07800
SJR Impact 1.99800
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877742223&doi=10.1038%2fsrep01714&partnerID=40&md5=4bf854d7f4d7b902a2d4b5a308d69688
Publication date 01/01/2013
ISI 000317927100003
Scopus Id 2-s2.0-84877742223
DOI 10.1038/srep01714
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.
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