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Fundamental loading-curve characteristics of the persistent phosphor SrAl2O4:Eu2+,Dy3+,B3+: the effect of temperature and excitation density

hal.structure.identifierDépartment de Chimie Physique
dc.contributor.authorDELGADO, Teresa
hal.structure.identifierLumiNova AG
dc.contributor.authorGARTMANN, Nando
hal.structure.identifierLumiNova AG
dc.contributor.authorWALFORT, Bernhard
hal.structure.identifierTransport at Nanoscale Interfaces Laboratory
dc.contributor.authorLAMATTINA, Fabio
hal.structure.identifierAdvanced Technology Institute
dc.contributor.authorPOLLNAU, Markus
hal.structure.identifierDépartment de Chimie Physique
dc.contributor.authorROSSPEINTNER, Arnulf
hal.structure.identifierDépartment de Chimie Physique
dc.contributor.authorAFSHANI, Jafar
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorOLCHOWKA, Jacob
hal.structure.identifierDépartment de Chimie Physique
dc.contributor.authorHAGEMANN, Hans
dc.date.issued2022
dc.description.abstractEnThe compound SrAl2O4:Eu2+,Dy3+ is currently one of the best-performing persistent phosphors and numerous studies have been performed to understand the mechanisms involved in its afterglow process. One aspect which so far has received only limited attention is the dependence of loading curve characteristics on dopant concentrations. Herein, a detailed study of the loading curves of SrAl2O4:Eu2+,Dy3+ as a function of composition, sample temperature, and pump intensity is presented, completed by emission decay and quantum yield measurements. The observed emission decays can be described using the Inokuti−Hirayama equation for a Dexter energy transfer (ET) process. As the Dexter ET rate and the electron transfer rate have a similar radial dependence, the Inokuti−Hirayama equation can also describe the electron transfer process involved for the trapping process. These observations indicate that in this persistent phosphor, the trapping process is a local process; however, different types of traps appear to present different “Dexter” critical radii R0. This electron transfer is also temperature dependent, which requires further investigations.
dc.language.isoen
dc.publisherWiley
dc.title.enFundamental loading-curve characteristics of the persistent phosphor SrAl2O4:Eu2+,Dy3+,B3+: the effect of temperature and excitation density
dc.typeArticle de revue
dc.identifier.doi10.1002/adpr.202100179
dc.subject.halChimie/Matériaux
bordeaux.journalAdvanced Photonics Research
bordeaux.page2100179 (9 p.)
bordeaux.volume3
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-03618175
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03618175v1
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