Low temperature luminescence and tunnelling effect in the Sr4Al14O25 co-doped with Eu2+and Dy3+ persistent luminescent phosphor

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dc.contributor.authorKarsu Asal E.C.
dc.date.accessioned2024-07-22T08:03:47Z
dc.date.available2024-07-22T08:03:47Z
dc.date.issued2023
dc.description.abstractThermoluminescence (TL) technique is very useful in the research of persistent Luminescence (PL) phosphors. It gives information about the existence of energy levels within the forbidden band and lifetime. The TL glow curve of Sr4Al14O25: Eu2+,Dy3+ persistent phosphor consists of two well-separated glow peaks at around 353 K and 438 K after both UV radiation and beta irradiation. To study the low temperature (≤ room temperature) glow peaks, low temperature TL (LTTL) measurements were performed with a homemade system after exposed to UV radiation. The sample was heated according to T(t)=T∞−(T∞−T0)e−αt equation starting from liquid nitrogen temperature, 77K. Besides the peaks at around 345 and 445 K according to LTTL results, Sr4Al14O25: Eu2+,Dy3+ has two more well-separated low temperature TL peaks at around 170 K and 295 K. The lifetime of the TL glow peaks (at 353 K and 438 K) was calculated according to [Formula presented] and the results were checked with fading tests. Moreover, TL sensitivity tests were carried out both with and without preheating. Finally, tunnelling effect was evaluated by using the results of sensitivity tests and fading tests. Interesting results were observed at sensitivity tests performed with preheating. The results indicates that the behaviour of two glow peaks is very different from each other. The mechanism behind the peak around 438 K is localised transition involving a tunnelling effect. © 2022 Elsevier Ltd
dc.identifier.DOI-ID10.1016/j.radphyschem.2022.110495
dc.identifier.issn0969806X
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/12447
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectDysprosium compounds
dc.subjectPhosphors
dc.subjectStrontium compounds
dc.subjectTemperature
dc.subjectThermoluminescence
dc.subjectUltraviolet radiation
dc.subjectphosphorus
dc.subjectstrontium
dc.subjectstrontium aluminate
dc.subjectunclassified drug
dc.subjectExponential heating
dc.subjectExponentials
dc.subjectGlow peaks
dc.subjectLow temperature thermoluminescence
dc.subjectLows-temperatures
dc.subjectPersistent luminescence
dc.subjectPersistent luminescence phosphor
dc.subjectSensitivity tests
dc.subjectSr4al14O25: eu2+,dy3+
dc.subjectTunneling effects
dc.subjectArticle
dc.subjectheating
dc.subjectkinetics
dc.subjectlow temperature
dc.subjectluminescence
dc.subjectthermoluminescence
dc.subjectultraviolet radiation
dc.subjectAluminum compounds
dc.titleLow temperature luminescence and tunnelling effect in the Sr4Al14O25 co-doped with Eu2+and Dy3+ persistent luminescent phosphor
dc.typeArticle

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