Excitonic improvement of colloidal nanocrystals in salt powder matrix for quality lighting and color enrichment

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epageA84en_US
dc.citation.issueNumber2en_US
dc.citation.spageA74en_US
dc.citation.volumeNumber24en_US
dc.contributor.authorErdem, T.en_US
dc.contributor.authorSoran-Erdem, Z.en_US
dc.contributor.authorKelestemur, Y.en_US
dc.contributor.authorGaponik, N.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2018-04-12T10:57:25Z
dc.date.available2018-04-12T10:57:25Z
dc.date.issued2016en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractHere we report excitonic improvement in color-converting colloidal nanocrystal powders enabled by co-integrating nonpolar greenand red-emitting nanocrystal energy transfer pairs into a single LiCl salt matrix. This leads to nonradiative energy transfer (NRET) between the cointegrated nanocrystals in the host matrix. Here we systematically studied the resulting NRET process by varying donor and acceptor concentrations in the powders. We observed that NRET is a strong function of both of the nanocrystal concentrations and that NRET efficiency increases with increasing acceptor concentration. Nevertheless, with increasing donor concentration in the powders, NRET efficiency was found to first increase (up to a maximum level of 53.9%) but then to decrease. As a device demonstrator, we employed these NRET-improved nanocrystal powders as color-converters on blue light-emitting diodes (LEDs), with the resulting hybrid LED exhibiting a luminous efficiency >70 lm/Welect . The proposed excitonic nanocrystal powders potentially hold great promise for quality lighting and color enrichment applications.en_US
dc.identifier.doi10.1364/OE.24.000A74en_US
dc.identifier.eissn1094-4087en_US
dc.identifier.urihttp://hdl.handle.net/11693/36920
dc.language.isoEnglishen_US
dc.publisherOSA - The Optical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/OE.24.000A74en_US
dc.source.titleOptics Expressen_US
dc.subjectColoren_US
dc.subjectEnergy transferen_US
dc.subjectLight emitting diodesen_US
dc.subjectLightingen_US
dc.subjectNanocrystalsen_US
dc.subjectPowdersen_US
dc.subjectSemiconducting gallium compoundsen_US
dc.subjectAcceptor concentrationsen_US
dc.subjectBlue light emitting diodesen_US
dc.subjectColloidal nanocrystalsen_US
dc.subjectDevice demonstratorsen_US
dc.subjectDonor concentrationsen_US
dc.subjectLuminous efficiencyen_US
dc.subjectNanocrystal powdersen_US
dc.subjectNonradiative energy transferen_US
dc.subjectNanocrystalline powdersen_US
dc.titleExcitonic improvement of colloidal nanocrystals in salt powder matrix for quality lighting and color enrichmenten_US
dc.typeArticleen_US

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