Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/26268
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Applied Physics | - |
dc.creator | Lau, CM | - |
dc.creator | Wu, X | - |
dc.creator | Kwok, KW | - |
dc.date.accessioned | 2015-10-13T08:27:28Z | - |
dc.date.available | 2015-10-13T08:27:28Z | - |
dc.identifier.issn | 0021-8979 | - |
dc.identifier.uri | http://hdl.handle.net/10397/26268 | - |
dc.language.iso | en | en_US |
dc.publisher | American Institute of Physics | en_US |
dc.rights | © 2015 AIP Publishing LLC. | en_US |
dc.rights | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in C. M. Lau, X. Wu and K. W. Kwok, J. Appl. Phys. 118, 034107 (2015) and may be found at https://dx.doi.org/10.1063/1.4927297 | en_US |
dc.title | Effects of vacancies on luminescence of Er-doped 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 ceramics | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.volume | 118 | - |
dc.identifier.issue | 3 | - |
dc.identifier.doi | 10.1063/1.4927297 | - |
dcterms.abstract | 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 ceramics doped with 0.01 mol Er3+ have been prepared and their photoluminescence (PL), ferroelectric, dielectric, and piezoelectric properties have been studied. By doping Er3+ at various sites, ceramics containing oxygen or cation vacancies have been prepared and their effects have been investigated. Ceramic containing no vacancy (i.e., doping Er3+ at the Bi3+ site) has also been prepared as a reference for the study. In addition to the reduction of the up-conversion PL emissions at 532, 547, and 660 nm, our results also reveal that oxygen vacancies can enhance, at the expense of the visible emissions, the near-infrared (1.44-1.66 μm) and mid-infrared (2.62-2.84 μm) down-conversion emissions. Similar results have also been observed for the ceramics containing cation vacancies, and the enhancement in the near-infrared emission becomes much more significant, reaching about 70% for the ceramic doped with Er3+ at the Na+ site. These should be attributed to the looping mechanism between the 4F7/2, 2H11/2, 4I9/2, and 4I11/2 levels facilitated by the cation vacancies and the efficient cross relaxations. The ceramics also exhibit reasonably good ferroelectric, dielectric, and piezoelectric properties, suggesting that they have great potential for multifunctional applications. | - |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Journal of applied physics, 2015, v. 118, no. 3, 34107, p. 034107-1-034107-8 | - |
dcterms.isPartOf | Journal of applied physics | - |
dcterms.issued | 2015 | - |
dc.identifier.scopus | 2-s2.0-84937469267 | - |
dc.identifier.eissn | 1089-7550 | - |
dc.identifier.rosgroupid | 2015002408 | - |
dc.description.ros | 2015-2016 > Academic research: refereed > Publication in refereed journal | - |
dc.description.oa | Version of Record | en_US |
dc.identifier.FolderNumber | OA_IR/PIRA | en_US |
dc.description.pubStatus | Published | en_US |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
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Lau_Vacancies_Luminescence_Er-doped.pdf | 1.94 MB | Adobe PDF | View/Open |
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