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Excitonic effects in ZnO nanowires and hollow nanotubes
Linköping University, The Institute of Technology. Linköping University, Department of Science and Technology.ORCID iD: 0000-0001-6235-7038
Russian Academy of Sciences .
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Science and Technology.
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2007 (English)In: Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X, Vol. 6486, no 648614Article in journal (Refereed) Published
Abstract [en]

Energy levels and wave functions of ground and excited states of an exciton are calculated by the method of imaginary time. Energy levels as functions of radius of single and double wall nanotube are studied. Asymptotic behavior of energy levels at large and small values of the radius using perturbation theory and adiabatic approximation is considered. Spatially indirect exciton in semiconductor nanowire is also investigated. Experimental result from high quality reproducible ZnO nanowires grown by low temperature chemical engineering is presented. State of the art high brightness white light emitting diodes (HB-LEDs) are demonstrated from the grown ZnO nano-wires. The color temperature and color rendering index (CRI) of the HB-LEDs values was found to be (3250 K, 82), and (14000 K, 93), for the best LEDs, which means that the quality of light is superior to one obtained from GaN LEDs available on the market today. The role of VZn and Vo on the emission responsible for the white light band as well as the peak position of this important wide band is thoroughly investigated in a systematic way.

Place, publisher, year, edition, pages
2007. Vol. 6486, no 648614
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-41110DOI: 10.1117/12.714005Local ID: 55153OAI: oai:DiVA.org:liu-41110DiVA: diva2:261960
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-01-15

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Willander, MagnusZhao, Q.X.Nour, Omer

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Willander, MagnusZhao, Q.X.Nour, Omer
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