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Blue-red electroluminescence from hybrid Eu:phosphors/ZnO-nanowires/p-GaN LED

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dc.contributor.author VIANA, B.
dc.contributor.author PAUPORTE, T.
dc.contributor.author LUPAN, O.
dc.contributor.author DEVIS, L.
dc.contributor.author GACOIN, T.
dc.date.accessioned 2022-04-21T09:28:34Z
dc.date.available 2022-04-21T09:28:34Z
dc.date.issued 2021
dc.identifier.citation VIANA, B., PAUPORTE, T., LUPAN, O. et al. Blue-red electroluminescence from hybrid Eu:phosphors/ZnO-nanowires/p-GaN LED. In: Oxide-based Materials and Devices 5. 2014. –V. 8987, pp. 365-370. en_US
dc.identifier.uri https://doi.org/10.1117/12.2041772
dc.identifier.uri http://repository.utm.md/handle/5014/20194
dc.description Access full text - https://doi.org/10.1117/12.2041772 en_US
dc.description.abstract Nanowire (NW) based light emitting diodes (LEDs) have drawn great research interest due to many advantages compared to thin film based devices. Marked improved performances are expected from nanostructured active layers for light emission. Semiconducting oxide nanowires can act as direct waveguides and favor emitted light extraction without use of lens and reflectors in LEDs. Moreover, the use of ZnO wires avoids the presence of grain boundaries and then the emission efficiency is boosted by the absence of non-radiative recombinations at the joint defects. In this context, europium (Eu):Chelate/ZnO:Mg-nanowires/p-GaN light-emitting-diode (LED) structures have been fabricated showing near-UV/violet electroluminescence and red emission from trivalent europium. Fabricated LED structures exhibit UV-blue light at about 380 nm coming from the n-(ZnO:Mg)/p-GaN and a sharp red emission at ∼611 nm related to the intra-4f transition of Eu ions. It is found that in the case of the ZnO:Mg, the emission wavelength is slightly shifted to smaller wavelength to be well adapted to the trivalent europium excitation band. Radiative energy transfer is achieved through strong overlap between the emission wavelength from n-(ZnO:Mg)/p-GaN heterojunction and chelate ligand intensive absorption band. Indeed the Eu:chelate/(ZnO:Mg)-nanowires/p-GaN structure appears well adapted to UV/blue and red dual emission. Our results shows that the design of LEDs based on the chelate ligands are important issue to enhance the performance of electroluminescence devices based on ZnO nanowire arrays/p-GaN heterojunction and rare-earth metal complexes. en_US
dc.language.iso en en_US
dc.publisher SPIE en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject nanostructured layers en_US
dc.subject light emissions en_US
dc.subject electroluminescence en_US
dc.subject semiconducting nanowires en_US
dc.subject nanowires en_US
dc.subject zinc oxide wires en_US
dc.subject LED structures en_US
dc.title Blue-red electroluminescence from hybrid Eu:phosphors/ZnO-nanowires/p-GaN LED en_US
dc.type Article en_US


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