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Article: The key roles of 4f-level splitting and vibronic coupling in the high-efficiency luminescence of Ce3+ ion in LuAG transparent ceramic phosphors

TitleThe key roles of 4f-level splitting and vibronic coupling in the high-efficiency luminescence of Ce3+ ion in LuAG transparent ceramic phosphors
Authors
KeywordsCe3+ ion-activated LuAG transparent ceramics
Photoluminescence
Quantum efficiency
Vibronic coupling
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jlumin
Citation
Journal of Luminescence, 2020, v. 225, p. 117360:1-117360:5 How to Cite?
AbstractCe3+ ion-activated lutetium aluminum garnet (LuAG:Ce) polycrystalline transparent ceramics (TCs) were prepared with high-temperature vacuum-sintering technology. The quantum efficiency of the characteristic Ce3+ 5d→4f luminescence of the prepared LuAG:Ce TC phosphor with 0.50at.% Ce sample was measured to be an almost unit. More interestingly, although the acquired low-temperature luminescence spectra still seemingly consist of double broad bands with considerable overlapping, the five major emission lines due to the multiple splittings of 4f shell of Ce3+ are at least unveiled on the basis of theoretical calculations with the semiclassical time-dependent approach of Heller. The pure electronic transition energy and electron-phonon coupling information of each individual emission line are thus determined. The study leads to some important understandings: (i) The 5d→4f transitions of Ce3+ ion are extremely efficient even in the complex polycrystalline environment; (ii) The radiative transitions are much complicated than the commonly understood picture; (iii) As the radiation energy increases, the vibronic coupling characterized by Huang-Rhys factor becomes weaker; Meanwhile, the contribution to the total luminescence tends to increase; (iv) The involved lattice vibration mode could be the low frequency mode of ∼260 cm−1.
Persistent Identifierhttp://hdl.handle.net/10722/285498
ISSN
2019 Impact Factor: 3.28
2015 SCImago Journal Rankings: 0.813

 

DC FieldValueLanguage
dc.contributor.authorTang, F-
dc.contributor.authorSu, Z-
dc.contributor.authorLAO, X-
dc.contributor.authorBAO, Y-
dc.contributor.authorZhu, D-
dc.contributor.authorXu, S-
dc.date.accessioned2020-08-18T03:53:59Z-
dc.date.available2020-08-18T03:53:59Z-
dc.date.issued2020-
dc.identifier.citationJournal of Luminescence, 2020, v. 225, p. 117360:1-117360:5-
dc.identifier.issn0022-2313-
dc.identifier.urihttp://hdl.handle.net/10722/285498-
dc.description.abstractCe3+ ion-activated lutetium aluminum garnet (LuAG:Ce) polycrystalline transparent ceramics (TCs) were prepared with high-temperature vacuum-sintering technology. The quantum efficiency of the characteristic Ce3+ 5d→4f luminescence of the prepared LuAG:Ce TC phosphor with 0.50at.% Ce sample was measured to be an almost unit. More interestingly, although the acquired low-temperature luminescence spectra still seemingly consist of double broad bands with considerable overlapping, the five major emission lines due to the multiple splittings of 4f shell of Ce3+ are at least unveiled on the basis of theoretical calculations with the semiclassical time-dependent approach of Heller. The pure electronic transition energy and electron-phonon coupling information of each individual emission line are thus determined. The study leads to some important understandings: (i) The 5d→4f transitions of Ce3+ ion are extremely efficient even in the complex polycrystalline environment; (ii) The radiative transitions are much complicated than the commonly understood picture; (iii) As the radiation energy increases, the vibronic coupling characterized by Huang-Rhys factor becomes weaker; Meanwhile, the contribution to the total luminescence tends to increase; (iv) The involved lattice vibration mode could be the low frequency mode of ∼260 cm−1.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jlumin-
dc.relation.ispartofJournal of Luminescence-
dc.subjectCe3+ ion-activated LuAG transparent ceramics-
dc.subjectPhotoluminescence-
dc.subjectQuantum efficiency-
dc.subjectVibronic coupling-
dc.titleThe key roles of 4f-level splitting and vibronic coupling in the high-efficiency luminescence of Ce3+ ion in LuAG transparent ceramic phosphors-
dc.typeArticle-
dc.identifier.emailXu, S: sjxu@hku.hk-
dc.identifier.authorityXu, S=rp00821-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jlumin.2020.117360-
dc.identifier.scopuseid_2-s2.0-85084474546-
dc.identifier.hkuros312906-
dc.identifier.volume225-
dc.identifier.spage117360:1-
dc.identifier.epage117360:5-
dc.publisher.placeNetherlands-

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