Kinetic study of the thermal quenching of the ultraviolet emission in Zn_2GeO_4 microrods

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dc.contributor.authorDolado Fernández, Jaime
dc.contributor.authorHidalgo Alcalde, Pedro
dc.contributor.authorMéndez Martín, Bianchi
dc.date.accessioned2023-06-22T10:41:39Z
dc.date.available2023-06-22T10:41:39Z
dc.date.issued2022
dc.descriptionCRUE-CSIC (Acuerdos Transformativos 2022) ©2022 WILEY-V C H VERLAG GMBH This work has been supported by MINECO projects M-ERA.NET PCIN-2017-106 and MICINN project (RTI2018-097195-B-I00). We thank the CAI (UCM) for XRD facilities.
dc.description.abstractZn_2GeO_4 microrods obtained by thermal evaporation of a compacted powder mixture of ZnO and Ge exhibit quite intense UV luminescence at low temperatures. Herein, the luminescence properties of Zn_2GeO_4 microrods are studied for 2:1 and 1:1 ZnO:Ge ratio in the precursor mixture. In both cases, Zn2GeO4 microrods of high crystal quality produce a 355 nm emission under aforementioned bandgap excitation conditions at low temperatures. However, this emission vanishes at room temperature (RT) in the 1:1 samples while it is kept in the 2:1 ones. Herein this work, the thermal quenching of the UV luminescence is studied by means of steady and time-resolved photoluminescence techniques from 4 K up to RT for both Zn_2GeO_4 microrods. The analysis of the results leads us to conclude that although the luminescence mechanisms are the same in both cases, a higher decay rate is observed in the 1:1 in both intensity and lifetime, which explain the observed thermal quenching at RT.
dc.description.departmentDepto. de Física de Materiales
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)/ FEDER
dc.description.sponsorshipMinisterio de Ciencia e Innovación (MICINN)/M-ERA.Net
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/71833
dc.identifier.doi10.1002/pssr.202100613
dc.identifier.issn1862-6254
dc.identifier.officialurlhttp://dx.doi.org/10.1002/pssr.202100613
dc.identifier.relatedurlhttps://onlinelibrary.wiley.com/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/71403
dc.journal.titlePhysica status solidi-rapid research letters
dc.language.isoeng
dc.publisherWiley-V C H VERLAG GMBH
dc.relation.projectIDRTI2018-097195-B-I00
dc.relation.projectIDPCIN- 2017-106
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.cdu538.9
dc.subject.keywordOptically stimulated luminescence
dc.subject.keywordZinc germanate
dc.subject.keywordMicrorods
dc.subject.keywordPhotoluminescence
dc.subject.keywordTemperature dependence luminescence
dc.subject.keywordThermal quenching
dc.subject.ucmFísica de materiales
dc.subject.ucmFísica del estado sólido
dc.subject.unesco2211 Física del Estado Sólido
dc.titleKinetic study of the thermal quenching of the ultraviolet emission in Zn_2GeO_4 microrods
dc.typejournal article
dspace.entity.typePublication
relation.isAuthorOfPublicationc834e5a4-3450-4ff7-8ca1-663a43f050bb
relation.isAuthorOfPublication.latestForDiscoveryc834e5a4-3450-4ff7-8ca1-663a43f050bb
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