dc.contributor.authorMangalam, Vivek
dc.contributor.authorPita, Kantisara
dc.date.accessioned2019-01-17T06:26:53Z
dc.date.available2019-01-17T06:26:53Z
dc.date.issued2018
dc.identifier.citationMangalam, V., & Pita, K. (2018). Effect of the interaction distance on 614 nm red emission from Eu3+ ions due to the energy transfer from ZnO-nc to Eu3+ ions. Optical Materials Express, 8(10), 3115-3132. doi:10.1364/OME.8.003115en_US
dc.identifier.urihttp://hdl.handle.net/10220/47506
dc.description.abstractIn this work, we study the effect of the average shortest interaction distance between zinc oxide nanocrystals (ZnO-nc) and Europium (Eu3+) ions and between two Eu3+ ions in the energy transfer process between ZnO-nc and Eu3+ ions embedded in a SiO2 matrix fabricated by a combination of sol-gel and the sputtering technique. A detailed model to calculate the two interaction distances based on the ratio of Zn, Si and Eu3+ ions in the samples and using the density and molecular mass of ZnO and SiO2 is presented. Based on these calculations together with the photoluminescence emission from the samples, it is clearly shown that the energy transfer from ZnO-nc to Eu3+ ions is higher in samples with a shorter distance between the ZnO-nc and Eu3+ ions. The maximum red emission at 614 nm due to the efficient energy transfer from ZnO-nc to Eu3+ was found in the sample with 5.11 nm distance between the ZnO-nc and Eu3+ ions. However, the red emission from the Eu3+ ions does not increase as the distance between the ZnO-nc and Eu3+ ions is reduced below 5.11 nm by increasing the Eu3+ concentration. This is due to the Eu3+ ion concentration quenching effect, where the distances between the Eu3+ ions become shorter than 0.57 nm, resulting in a migration of energy between the Eu3+ ions that is non-radiatively dissipated. It is also shown that the energy transfer from ZnO-nc to Eu3+ ions occur mostly due to the radiative energy transfer process when the interaction distance between the ZnO-nc and Eu3+ ions is 6.53 nm or greater.en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent18 p.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesOptical Materials Expressen_US
dc.rights© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.en_US
dc.subjectInteraction Distanceen_US
dc.subjectEnergy Transferen_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen_US
dc.titleEffect of the interaction distance on 614 nm red emission from Eu3+ ions due to the energy transfer from ZnO-nc to Eu3+ ionsen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.identifier.doihttp://dx.doi.org/10.1364/OME.8.003115
dc.description.versionPublished versionen_US
dc.contributor.organizationCentre for OptoElectronics and Biophotonicsen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record