Green stimulated emission boosted by nonradiative resonant energy transfer from blue quantum dots

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage2778en_US
dc.citation.issueNumber14en_US
dc.citation.spage2772en_US
dc.citation.volumeNumber7en_US
dc.contributor.authorGao, Y.en_US
dc.contributor.authorYu, G.en_US
dc.contributor.authorWang Y.en_US
dc.contributor.authorDang C.en_US
dc.contributor.authorSum, T. C.en_US
dc.contributor.authorSun, H.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2018-04-12T10:51:27Z
dc.date.available2018-04-12T10:51:27Z
dc.date.issued2016en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractThanks to their tunability and versatility, the colloidal quantum dots (CQDs) made of II-VI semiconductor compound offer the potential to bridge the "green gap" in conventional semiconductors. However, when the CQDs are pumped to much higher initial excitonic states compared to their bandgap, multiexciton interaction is enhanced, leading to a much higher stimulated emission threshold. Here, to circumvent this drawback, for the first time, we show a fully colloidal gain in green enabled by a partially indirect pumping approach assisted by Förster resonance energy transfer process. By introducing the blue CQDs as exciton donors, the lasing threshold of the green CQDs, is reduced dramatically. The blue CQDs thus serve as an energy-transferring buffer medium to reduce excitation energy from pumping photons in a controlled way by injecting photoinduced excitons into green CQDs. Our newly developed colloidal pumping scheme could enable efficient CQD lasers of full visible colors by a single pump source and cascaded exciton transfer. This would potentially pave the way for an efficient multicolor laser for lighting and display applications.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T10:51:27Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2016en
dc.identifier.doi10.1021/acs.jpclett.6b01122en_US
dc.identifier.issn1948-7185
dc.identifier.urihttp://hdl.handle.net/11693/36735
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/acs.jpclett.6b01122en_US
dc.source.titleJournal of Physical Chemistry Lettersen_US
dc.subjectEnergy transferen_US
dc.subjectExcitonsen_US
dc.subjectNanocrystalsen_US
dc.subjectPumping (laser)en_US
dc.subjectSemiconductor lasersen_US
dc.subjectStimulated emissionen_US
dc.subjectColloidal quantum dotsen_US
dc.subjectDisplay applicationen_US
dc.subjectExciton transferen_US
dc.subjectLasing thresholden_US
dc.subjectPumping schemesen_US
dc.subjectResonance energy transferen_US
dc.subjectResonant energy transferen_US
dc.subjectSemiconductor compoundsen_US
dc.subjectSemiconductor quantum dotsen_US
dc.titleGreen stimulated emission boosted by nonradiative resonant energy transfer from blue 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)