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DC Field | Value | Language |
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dc.contributor.author | den Engelsen, D | - |
dc.contributor.author | Fern, GR | - |
dc.contributor.author | Ireland, TG | - |
dc.contributor.author | Harris, PG | - |
dc.contributor.author | Hobson, PR | - |
dc.contributor.author | Lipman, A | - |
dc.contributor.author | Dhillon, R | - |
dc.contributor.author | Marsh, PJ | - |
dc.contributor.author | Silver, J | - |
dc.date.accessioned | 2016-09-19T14:05:37Z | - |
dc.date.available | 2016-09-19T14:05:37Z | - |
dc.date.issued | 2016-07-08 | - |
dc.identifier.citation | den Engelsen, D., Fern, G.R., Ireland, T.G., Harris, P.G., Hobson, P.R., Lipman, A., Dhillon, R., Marsh, P.J. and Silver, J. (2016) 'Ultraviolet and blue cathodoluminescence from cubic Y2O3 and Y2O3: Eu3+ generated in a transmission electron microscope', Journal of Materials Chemistry C, 4(29), pp. 7026 - 7034. doi: 10.1039/c6tc01750a. | en_US |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.uri | https://bura.brunel.ac.uk/handle/2438/13180 | - |
dc.description.abstract | Copyright © The Author(s) 2016. Herein we describe the investigation of transmission electron microscopeof non-doped Y2O3 and Y2O3 doped with Eu3+ in a transmission electron microscope (TEM) equipped with a spectrometer to detect cathodoluminescence from individual particles. Each submicron particle was made up of nanometre sized crystals. We found that these crystals showed a broad emission band at 353 nm upon bombardment with 200 keV or 80 keV electrons. Upon increasing the Eu3+ concentration from 0 to 2 mol% this UV/blue emission was gradually quenched: at Eu3+ concentrations >2 mol% no UV/blue emission was detected, only the well-known cathodoluminescence (CL) spectrum of Y2O3:Eu3+ could be recorded. This UV/blue emission has been attributed to the intrinsic luminescence of Y2O3 caused by self-trapped excitons. We found that the UV/blue luminescence was strongly temperature dependent and that the trap depth of the self-trapped excitons was 0.14 eV. The ratios of the spectral radiances of 5D1 → 7FJ and 5D0 → 7FJ (J = 0, 1...6) Eu3+ transitions in the CL-TEM spectra of Y2O3:Eu3+ at low Eu3+ concentrations was about a factor of 10 larger than those recorded at 15 keV. This phenomenon has been explained by absorption of the intrinsic luminescence of Y2O3 by Eu3+. | en_US |
dc.description.sponsorship | The EPSRC and the Technology Strategy Board (TSB) funded the PURPOSE (TP11/MFE/6/I/AA129F; EPSRC TS/G000271/1), CONVERTED (JeS no. TS/1003053/1) and PRISM (EP/N508974/1) programs. The TSB for funding the CONVERT program. | en_US |
dc.description.sponsorship | We are grateful to the EPSRC and the Technology Strategy Board (TSB) for funding the PURPOSE (TP11/MFE/6/I/AA129F; EPSRC TS/G000271/1), CONVERTED (JeS no. TS/1003053/1) and PRISM (EP/N508974/1) programs. We are also grateful to the TSB for funding the CONVERT program. | - |
dc.format.extent | 7026 - 7034 | - |
dc.format.medium | Print-Electronic | - |
dc.format.medium | Print-Electronic | - |
dc.language.iso | en | en_US |
dc.publisher | Royal Society of Chemistry | en_US |
dc.rights | Copyright © The Author(s) 2016. This article is Open Access under a Creative Commons Attribution 3.0 Unported Licence CC BY (https://creativecommons.org/licenses/by/3.0/). | - |
dc.rights.uri | https://creativecommons.org/licenses/by/3.0/ | - |
dc.subject | transmission electron microscope | en_US |
dc.subject | Transmission electron microscope | en_US |
dc.title | Ultraviolet and blue cathodoluminescence from cubic Y2O3 and Y2O3: Eu3+ generated in a transmission electron microscope | en_US |
dc.type | Article | en_US |
dc.identifier.doi | https://doi.org/10.1039/c6tc01750a | - |
dc.relation.isPartOf | Journal of Materials Chemistry C | - |
pubs.issue | 29 | - |
pubs.publication-status | Published | - |
pubs.volume | 4 | - |
dc.identifier.eissn | 2050-7534 | - |
dc.rights.holder | The Author(s) | - |
Appears in Collections: | Wolfson Centre for Sustainable Materials Development and Processing Dept of Electronic and Electrical Engineering Research Papers |
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