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Optical properties from photoelectron energy-loss spectroscopy of low-temperature aqueous chemically synthesized ZnO nanorods grown on Si
Universidade Federal da Bahia, Campus Ondina, Salvador-Ba, Brazil.
Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska fakulteten.
Universidade Federal da Bahia, Campus Ondina, Salvador-Ba, Brazil.
Royal Institute of Technology, Stockholm, Sweden.
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2019 (engelsk)Inngår i: Semiconductor Science and Technology, ISSN 0268-1242, E-ISSN 1361-6641, Vol. 34, nr 4, artikkel-id 045019Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The optical properties of zinc oxide (ZnO) nanorods (NRs) synthesized by the low-temperature aqueous chemical method on top of silicon (Si) substrate have been investigated by means of photoelectron energy loss spectroscopy (PEELS). The ZnO NRs were obtained by the low temperature aqueous chemical synthesis on top of Si substrate. The measured valence band, the dynamical dielectric functions and optical absorption of the material show a reasonable agreement when the trending and shape of the theoretical calculations are considered. A first-principle calculation based on density functional theory (DFT) was performed using the partially self-consistent GW approximation (scGW0) and compared to the experimental results. The application of these two techniques brings a new analysis of the electronic properties of this material. The experimental results regarding the density of states (DOS) obtained for the valence band using x-ray photoelectron spectroscopy (XPS) was found to be consistent with the theoretical calculated value. Due to this consistency, the same wavefunctions was then employed to calculate the dielectric function of the ZnO NRs. The experimentally extracted dielectric function was also consistent with the calculated values.

sted, utgiver, år, opplag, sider
American Institute of Physics (AIP), 2019. Vol. 34, nr 4, artikkel-id 045019
Emneord [en]
ZnO nanorods; optical properties; density of states; dielectric function; density functional theory
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Identifikatorer
URN: urn:nbn:se:liu:diva-155654DOI: 10.1088/1361-6641/ab0bc4ISI: 000461940800007OAI: oai:DiVA.org:liu-155654DiVA, id: diva2:1298413
Merknad

Funding agencies: National Research Council of Scientific and Technological Development (CNP); Bahia Research Foundation (FAPESB)/PRONEX; CAPES Foundation within the Ministry of Education, Research Council of Norway [243642]

Tilgjengelig fra: 2019-03-22 Laget: 2019-03-22 Sist oppdatert: 2019-04-03bibliografisk kontrollert

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Alnoor, HatimNur, OmerWillander, Magnus

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