White light generation by resonant nonradiative energy transfer from epitaxial InGaN/GaN quantum wells to colloidal CdSe/ZnS core/shell quantum dots

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage123001-1en_US
dc.citation.spage123001-10en_US
dc.citation.volumeNumber10en_US
dc.contributor.authorNizamoglu, S.en_US
dc.contributor.authorSari, E.en_US
dc.contributor.authorBaek, J.-H.en_US
dc.contributor.authorLee, I.-H.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2016-02-08T10:06:05Z
dc.date.available2016-02-08T10:06:05Z
dc.date.issued2008en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractWe propose and demonstrate white-light-generating nonradiative energy transfer (ET) from epitaxial quantum wells (QWs) to colloidal quantum dots (QDs) in their close proximity. This proof-of-concept hybrid color-converting system consists of chemically synthesized red-emitting CdSe/ZnS core/shell heteronanocrystals intimately integrated on epitaxially grown cyanemitting InGaN/GaN QWs. The white light is generated by the collective luminescence of QWs and QDs, for which the dot emission is further increased by 63% with nonradiative ET, setting the operating point in the white region of CIE chromaticity diagram. Using cyan emission at 490 nm from the QWs and red emission at 650 nm from the nanocrystal (NC) luminophors, we obtain warm white light generation with a correlated color temperature of Tc = 3135 K and tristimulus coordinates of (x, y) = (0.42, 0.39) in the white region. By analyzing the time-resolved radiative decay of these NC emitters in our hybrid system with a 16 ps time resolution, the luminescence kinetics reveals a fast ET with a rate of (2 ns)-1 using a multiexponential fit with χ2 = 1.0171.en_US
dc.identifier.doi10.1088/1367-2630/10/12/123001en_US
dc.identifier.eissn1367-2630
dc.identifier.urihttp://hdl.handle.net/11693/22889
dc.language.isoEnglishen_US
dc.publisherInstitute of Physics Publishing Ltd.en_US
dc.relation.isversionofhttp://doi.org/10.1088/1367-2630/10/12/123001en_US
dc.source.titleNew Journal of Physicsen_US
dc.titleWhite light generation by resonant nonradiative energy transfer from epitaxial InGaN/GaN quantum wells to colloidal CdSe/ZnS core/shell quantum dotsen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)
Nanotechnology Research Center (NANOTAM)