2006
DOI: 10.1007/s10832-006-0460-6
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Photoluminescence and photocurrent characteristics of Eu2 + activated MAl2O4 (M = Ba, Ca, Sr) phosphors

Abstract: Photoluminescence and photocurrent characteristics of Eu 2+ activated MAl 2 O 4 (M = Ba, Ca, Sr) phosphors during and after Ultraviolet ray and visible light irradiation have been investigated. The photoluminescence (PL) and the photocurrent (PC) of the phosphors, in order to elucidate the relationship between the PL and the PC, were measured simultaneously on the same samples within a specially designed measuring box. Composition effects, such as a presence of Dy 3+ as a co-activator and Al-rich composition o… Show more

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“…2 (a), the sample has two main phases: BaAl 2 O 4 and BaAl 2 Si 2 O 8 . According to the literature of BaAl 2 O 4 :Eu 2+ phosphor [19, 20], we ascribe the 501 nm emission to the Eu 2+ ion on Ba(1) site, and the 540 nm emission to the Eu 2+ ion on Ba(2) site. The assignment of Eu 2+ on barium sites can also be explained by means of preferential orientation of a d orbital of Eu 2+ ion as proposed by Poort [21].…”
Section: Resultsmentioning
confidence: 99%
“…2 (a), the sample has two main phases: BaAl 2 O 4 and BaAl 2 Si 2 O 8 . According to the literature of BaAl 2 O 4 :Eu 2+ phosphor [19, 20], we ascribe the 501 nm emission to the Eu 2+ ion on Ba(1) site, and the 540 nm emission to the Eu 2+ ion on Ba(2) site. The assignment of Eu 2+ on barium sites can also be explained by means of preferential orientation of a d orbital of Eu 2+ ion as proposed by Poort [21].…”
Section: Resultsmentioning
confidence: 99%