The effects of dopant concentration and excitation intensity on the upconversion and downconversion emission processes of β-NaYF4:Yb3+,Er3+nanoparticles

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dc.contributor.authorTorres Vera, Vivian Andrea
dc.contributor.authorMéndez González, Diego
dc.contributor.authorRamos Ramos, D. J.
dc.contributor.authorIgalla El-Youssfi, Asmae
dc.contributor.authorLaurenti, Marco
dc.contributor.authorContreras Cáceres, Rafael
dc.contributor.authorLópez Cabarcos, Enrique
dc.contributor.authorDíaz García, Elena
dc.contributor.authorRubio Retama, Benito Jorge
dc.contributor.authorMelle Hernández, Sonia
dc.contributor.authorGómez Calderón, Óscar
dc.dateSubmitted: 29 Mar 2021 / Accepted: 03 Jun 2021 / First published: 04 Jun 2021.
dc.date.accessioned2023-06-17T09:13:01Z
dc.date.available2023-06-17T09:13:01Z
dc.date.copyrightThis journal is © The Royal Society of Chemistry 2021.
dc.date.issued2021-06-04
dc.description.abstractThe dopant concentration of lanthanide ions in photon upconversion nanoparticles (UCNPs) remains one of the key points to boost the brightness of these nanomaterials and, therefore, their application developments. Here, we analyzed the effect of Er3+ and Yb3+ dopant concentrations of b-NaYF4:Yb3+,Er3+ nanoparticles on the visible upconversion and near-infrared downconversion luminescence intensities. Our approach carefully excluded all other factors whose variation affects luminescence properties such as the size, morphology, crystal structure, ion distribution, ligand, and surrounding medium, allowing us to exactly infer the influence of the ratio of Yb3+ to Er3+ ions on the nanoparticle luminescence. To maintain the size and morphological properties of nanoparticles, we used a total dopant concentration of 22% while varying the ratio of Yb3+ to Er3+ ions from 0 to 10. A huge increase in luminescence takes place as the Yb/Er ratio increases following a power-law behavior, and this luminescence enhancement is greater at low excitation intensities. Above a Yb/Er ratio of around two, saturation occurs with a slight peak when this ratio is around four. Simulations using a rate equation model showed that upconversion luminescence (UCL) is mainly produced by the energy transfer between neighboring Er3+ ions at low Yb/Er ratios, while at high ratios, the energy transfer from Yb3+ to Er3+ ions dominates. However, downconversion luminescence (DCL) is produced at all analyzed ratios, except 0, by the previous mechanism.en
dc.description.departmentDepto. de Química en Ciencias Farmacéuticas
dc.description.departmentSección Deptal. de Óptica (Óptica)
dc.description.facultyFac. de Farmacia
dc.description.facultyFac. de Óptica y Optometría
dc.description.refereedTRUE
dc.description.sponsorshipUnión Europea
dc.description.sponsorshipMinisterio de Economía, Comercio y Empresa (España)
dc.description.sponsorshipComunidad de Madrid
dc.description.sponsorshipUniversidad Complutense de Madrid/Banco de Santander
dc.description.sponsorshipComisión Europea
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/67711
dc.identifier.citationTorres Vera, V. A., Méndez González, D., Ramos Ramos, D. J. et al. «The Effects of Dopant Concentration and Excitation Intensity on the Upconversion and Downconversion Emission Processes of β-NaYF 4 :Yb 3+ ,Er 3+ Nanoparticles». Journal of Materials Chemistry C, vol. 9, n.o 28, 2021, pp. 8902-11. DOI.org (Crossref), https://doi.org/10.1039/D1TC01419F.
dc.identifier.doi10.1039/d1tc01419f
dc.identifier.issn2050-7526
dc.identifier.officialurlhttps://doi.org/10.1039/D1TC01419F
dc.identifier.relatedurlhttp://pubs.rsc.org/en/journals/journalissues/tc#!recentarticles&all
dc.identifier.urihttps://hdl.handle.net/20.500.14352/8412
dc.issue.number28
dc.journal.titleJournal of materials chemistry C
dc.language.isoeng
dc.page.final8911
dc.page.initial8902
dc.publisherRoyal Soc. Chemistry
dc.relation.projectIDNanoTBTech (801305)
dc.relation.projectID(MAT2016-75955, MAT2017-83111R, and PID2019-106820RB-C21)
dc.relation.projectIDRENIM-CM (B2017/BMD-3867
dc.relation.projectID(CT 17/17-CT18/17)
dc.relation.projectIDYEI (PEJD-2018-PRE/IND-9118)
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/Number of agreement
dc.rights.accessRightsrestricted access
dc.subject.cdu620.3‑046.45
dc.subject.keywordCrystal structure
dc.subject.keywordEnergy transfer
dc.subject.keywordInfrared devices
dc.subject.keywordIons
dc.subject.keywordNanoparticles
dc.subject.keywordSemiconductor doping
dc.subject.keywordApplication development
dc.subject.keywordDopant concentrations
dc.subject.keywordLuminescence enhancements
dc.subject.keywordLuminescence intensity
dc.subject.keywordLuminescence properties
dc.subject.keywordMorphological properties
dc.subject.keywordPhoton up conversions
dc.subject.keywordUpconversion luminescence
dc.subject.keywordLuminescence
dc.subject.ucmFísica de materiales
dc.subject.ucmPartículas
dc.subject.unesco2208 Nucleónica
dc.titleThe effects of dopant concentration and excitation intensity on the upconversion and downconversion emission processes of β-NaYF4:Yb3+,Er3+nanoparticlesen
dc.typejournal article
dc.volume.number9
dspace.entity.typePublication
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