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dc.contributor.authorSoheyli, Ehsan
dc.contributor.authorZargoush, Sirous
dc.contributor.authorYazici, Ahmet Faruk
dc.contributor.authorSahraei, Reza
dc.contributor.authorMutlugun, Evren
dc.date.accessioned2022-02-17T06:40:34Z
dc.date.available2022-02-17T06:40:34Z
dc.date.issued2021en_US
dc.identifier.issn0022-3727
dc.identifier.issn1361-6463
dc.identifier.urihttps //doi.org/10.1088/1361-6463/ac26f5
dc.identifier.urihttps://hdl.handle.net/20.500.12573/1154
dc.description.abstractCdTe-based semiconductor nanocrystals (NCs) with size and composition-dependent efficient bandgap properties are historically mature nanomaterials for colloidal optoelectronic applications. In this work, we present the highly luminescent quaternary ZnCdTeS NCs with tunable emission across a wide visible spectrum from green to red spectral range. Prepared via a direct aqueous-based approach, a second capping agent of trisodium citrate (TSC) was used to enhance the photoluminescence (PL) emission efficiency, the chemical stability, and to spectrally widen the coverage of the emission spectra of ZnCdTeS NCs. Adding TCS created a remarkable blue shift from 572 nm in the absence of TSC, to 548 nm. On the other hand, upon optimization of experimental parameters, superior ZnCdTeS NCs with a narrow PL profile typically less than 50 nm, the high quantum efficiency of 76%, and tunable emission from 515-to-645 nm were synthesized in an aqueous solvent. The keynotes were the superior and reproducible luminescent properties for the core only NCs, without shell and using relatively low reaction temperatures. It was shown that in the suggested synthesis method, the high efficiency emitted color of ZnCdTeS NCs can be easily controlled from 515-to-650 nm with excellent stability against harsh conditions. The biexponential decay profiles of samples prepared at different reaction temperatures demonstrated that the average recombination lifetime is below 40 ns and increases with the growth of the ZnCdTeS NCs. Results reveal that the excitonic energy levels have the main role in the recombination process. Finally, to demonstrate the functional advantages of the prepared NCs in optoelectronics, the NCs were used to fabricate color-conversion white light-emitting diodes. The color coordinate of the device is recorded as (0.4951, 0.3647) with CRI of 91, CCT of 1954 K, and LER of 251 lm W-1 by employing only two distinct emitters for color conversion.en_US
dc.language.isoengen_US
dc.publisherIOP PUBLISHING LTDTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLANDen_US
dc.relation.isversionof10.1088/1361-6463/ac26f5en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectwhite LEDen_US
dc.subjectPL lifetimeen_US
dc.subjectwide tunable emissionen_US
dc.subjecthigh quantum efficiencyen_US
dc.subjectZnCdTeS nanocrystalsen_US
dc.titleHighly luminescent ZnCdTeS nanocrystals with wide spectral tunability for efficient color-conversion white-light-emitting-diodesen_US
dc.typearticleen_US
dc.contributor.departmentAGÜ, Mühendislik Fakültesi, Elektrik - Elektronik Mühendisliği Bölümüen_US
dc.contributor.authorID0000-0003-2747-7856en_US
dc.contributor.institutionauthorYazici, Faruk Ahmet
dc.contributor.institutionauthorMutlugun, Evren
dc.identifier.volumeVolume 54 Issue 50en_US
dc.relation.journalJOURNAL OF PHYSICS D-APPLIED PHYSICSen_US
dc.relation.publicationcategoryMakale - Uluslararası - Editör Denetimli Dergien_US


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