2010
DOI: 10.3390/ma3042536
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Persistent Luminescence in Eu2+-Doped Compounds: A Review

Abstract: In 1996, Matsuzawa et al. reported on the extremely long-lasting afterglow of SrAl2O4:Eu2+ codoped with Dy3+ ions, which was more than 10-times brighter than the previously widely used ZnS:Cu,Co. Since then, research for stable and efficient persistent phosphors has continuously gained popularity. However, even today - almost 15 years after the discovery of SrAl2O4:Eu2+, Dy3+ - the number of persistent luminescent materials is still relatively low. Furthermore, the mechanism behind this phenomenon is still unc… Show more

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Cited by 923 publications
(576 citation statements)
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“…Although many new persistent phosphors have been reported since then [1,4], rare earth doped strontium aluminates are still by far the most studied and commercialized compounds. SrAl 2 O 4 :Eu,Dy is widely used in various glow-in-the-dark applications, ranging from emergency signage and watch dials to toys.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Although many new persistent phosphors have been reported since then [1,4], rare earth doped strontium aluminates are still by far the most studied and commercialized compounds. SrAl 2 O 4 :Eu,Dy is widely used in various glow-in-the-dark applications, ranging from emergency signage and watch dials to toys.…”
Section: Introductionmentioning
confidence: 99%
“…The discovery of europium and dysprosium codoped strontium aluminate (SrAl 2 O 4 :Eu,Dy) in 1994 marked the beginning of the second generation of persistent or afterglow phosphors, also called glow-in-the-dark materials [1][2][3]. Although many new persistent phosphors have been reported since then [1,4], rare earth doped strontium aluminates are still by far the most studied and commercialized compounds.…”
Section: Introductionmentioning
confidence: 99%
“…Although most of the general principles behind the afterglow mechanism are now understood, many of the details remain the subject of discussion. 7 A crucial role is played by energy levels in the band gap of the host material, introduced by defects in the crystal lattice (e.g., vacancies or codopants). These so-called "traps" are able to capture charge carriers originating from the luminescent centers (electrons in most cases, 8 although hole trapping has been suggested by some authors and for some materials 7 ).…”
Section: Introductionmentioning
confidence: 99%
“…7 A crucial role is played by energy levels in the band gap of the host material, introduced by defects in the crystal lattice (e.g., vacancies or codopants). These so-called "traps" are able to capture charge carriers originating from the luminescent centers (electrons in most cases, 8 although hole trapping has been suggested by some authors and for some materials 7 ). These charge carriers remain trapped until enough thermal energy is available to help them escape and recombine at a luminescent center.…”
Section: Introductionmentioning
confidence: 99%
“…Persistent luminescent materials are phosphors which are able to emit light for a long time after being excited [14]. This remarkable 'afterglow' of persistent luminescence originates in energy storage in the phosphor by trapping of charge carriers in long-lived energy levels inside the band gap.…”
mentioning
confidence: 99%