Optical properties of KCl:Sn2+ phosphors synthesized from aqueous KCl/SnCl2 solutions

Nara, Jun-ichi; Adachi, Sadao

doi:10.1063/1.3664916

Cited by 19 publications

(23 citation statements)

References 45 publications

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“…The slow decay times τ 2 determined herein were 3.2 μs (B1) and 7.8 μs (G and R) at 20 K; 2.7 μs (B1) and 5.8 μs (G and R) at 300 K. In addition to single exponent processes, a two exponent decay process has been previously observed in Sn 2+ -activated alkali halide phosphors. 12,13,16,17,19,[22][23][24][25][26]28 The decay times reported by us (∼2.7-7.8 μs) were in good agreement with those in the literature.…”

Section: Resultssupporting

confidence: 90%

Optical Properties of NaCl:Sn²⁺Phosphor Synthesized from Aqueous NaCl/SnCl₂/HCl Solution

Kondo

Adachi

2012

ECS J. Solid State Sci. Technol.

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A NaCl:Sn 2+ phosphor was synthesized from an aqueous NaCl/SnCl 2 /HCl solution. The optical properties of the as-synthesized phosphor material were investigated by diffuse reflectance spectroscopy, photoluminescence (PL) analysis, PL excitation (PLE) spectroscopy, and luminescence decay time measurement. The effects of temperature and excitation wavelength on the emission spectra were thoroughly studied in the present study. The temperature dependence of the PL spectra was examined between T = 20 and 300 K in 10 K increments, while the PLE spectra were obtained by excitation with λ ex ∼ 250-330 nm in the same temperature range. The PL spectra revealed four independent emission bands with peaks at ∼440 nm (B1), ∼490 nm (B2), ∼540 nm (G), and ∼635 nm (R). The B1 and G emission bands were assigned to the A T and A X emission bands typically observed in ns 2 -doped alkali halide phosphors, whereas the B2 and R emission bands were attributed to the Sn 2+ − V − Na (cation vacancy) dipole aggregates.Alkali halide phosphors that contain heavy-metal ions with an s 2 configuration have received a great deal of attention both from theoretical and experimental point of views. 1-8 A considerable number of studies have reported the photoluminescence (PL) properties of Sn 2+ -activated alkali halides (such as KCl:Sn 2+ , [9][10][11][12][13] KBr:Sn 2+ , 10,14-17 and KI:Sn 2+ , 14,18-29 ) and other phosphors. 30 However, complete studies on the PL properties of Sn 2+ -activated NaCl phosphors are scarce in the literature. [31][32][33] Kynev and Tabakova 31 studied the effects of divalent cation additives (Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , Zn 2+ , and Cd 2+ ) on the PL and PL excitation (PLE) properties of NaCl:Sn 2+ phosphor. The addition of such divalent cations along with the Sn 2+ activator caused significant changes in both the PL and PLE properties of the phosphor. The divalent cations could be divided into two groups on the basis of the effects they produce. The first group of cations (Zn 2+ , Cd 2+ , and Mg 2+ ) produced new, shorter-wavelength emission bands located at ∼440-465 nm along with long-wavelength emission bands in the 520-530 nm region. Interestingly, the emission band at ∼490 nm, which is a characteristic of NaCl:Sn 2+ , was no longer present after addition of these cations. The second group of cations (Ca 2+ , Ba 2+ , and Sr 2+ ) caused a redshift in the ∼490 nm emission band together with an appreciable increase in its spectral width.Mȃrculescu et al. 32 investigated the PL and PLE properties of a Bridgman-grown NaCl:Sn 2+ phosphor with particular emphasis on the effects of concentration and thermal history of the crystals. The aggregation centers formed in NaCl:Sn 2+ showed absorption and emission bands different from those of isolated Sn 2+ − V − Na (cation vacancy) dipoles. PL properties of Sn 2+ -sensitized Mn 2+ centers in NaCl were also investigated by Muñoz F. and Rubio O. 33 Thermoluminescence (TL) emission and decay kinetics of Sn 2+ -doped NaCl were studied by Acharya et al. 34 They reported that th...

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Section: Resultssupporting

confidence: 90%

Optical Properties of NaCl:Sn²⁺Phosphor Synthesized from Aqueous NaCl/SnCl₂/HCl Solution

Kondo

Adachi

2012

ECS J. Solid State Sci. Technol.

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“…7 (E q = 2.0 eV). It has been found good agreement between in the quenching energies determined from I PL (T) and s eff (T) in SnCl 2 :Sn 2+ [26], MnF 2 :Mn 2+ [27], and KCl:Sn 2+ [28]. No good agreement has, however, been found in some Mn 4+ -activated phosphors [29][30][31].…”

Section: Pl Decay Characteristicsmentioning

confidence: 61%

Synthesis and photoluminescence spectroscopy of BaGeF6:Mn4+ red phosphor

Sekiguchi

Adachi

2015

Optical Materials

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“…The R emission band is due to the interband transitions of electrons in the valence band (VB) to the conduction band (CB). 36 Similarly, SnCl 2 emits light with peaks at A T ∼ 450 nm and A X ∼ 600 nm. 13a, the PLE spectrum of the G emission band yields three excitation peaks at ∼3.9, ∼4.5, and ∼5.4 eV.…”

Section: Discussionmentioning

confidence: 99%

“…8) that the origins of the R and G emission bands will be different. 36 and references therein). As shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

Photoluminescence Properties of SnO₂·H₂O Phosphor

Arai¹,

Adachi²

2012

ECS J. Solid State Sci. Technol.

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SnO 2 · H 2 O phosphor was synthesized by chemically etching metallic tin in aqueous HNO 3 solution. The optical properties of the synthesized phosphor were investigated by diffuse reflectance measurement, photoluminescence (PL) analysis, and PL excitation (PLE) spectroscopy. SnO 2 · H 2 O phosphor exhibited red (R) and green (G) emission bands with peaks at ∼600 and ∼500 nm, respectively. The PL spectra showed a clear dependence not only on lattice temperature but also on excitation light wavelength and power. The R emission band showed a single excitation peak at ∼4 eV, while the PLE spectrum of the G emission band exhibited three main peaks at ∼3.9, ∼4.5, and ∼5.4 eV. Such PL properties were interpreted considering electron transfer at excited states and using the configurational-coordinate model. The PL properties of SnO 2 · H 2 O phosphor were also discussed in comparison with those of SnO 2 nanomaterials.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.63.180.147 Downloaded on 2015-03-03 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.63.180.147 Downloaded on 2015-03-03 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.63.180.147 Downloaded on 2015-03-03 to IP

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Optical properties of KCl:Sn2+ phosphors synthesized from aqueous KCl/SnCl2 solutions

Cited by 19 publications

References 45 publications

Optical Properties of NaCl:Sn²⁺Phosphor Synthesized from Aqueous NaCl/SnCl₂/HCl Solution

Optical Properties of NaCl:Sn²⁺Phosphor Synthesized from Aqueous NaCl/SnCl₂/HCl Solution

Synthesis and photoluminescence spectroscopy of BaGeF6:Mn4+ red phosphor

Photoluminescence Properties of SnO₂·H₂O Phosphor

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Optical properties of KCl:Sn2+ phosphors synthesized from aqueous KCl/SnCl2 solutions

Cited by 19 publications

References 45 publications

Optical Properties of NaCl:Sn2+Phosphor Synthesized from Aqueous NaCl/SnCl2/HCl Solution

Optical Properties of NaCl:Sn2+Phosphor Synthesized from Aqueous NaCl/SnCl2/HCl Solution

Synthesis and photoluminescence spectroscopy of BaGeF6:Mn4+ red phosphor

Photoluminescence Properties of SnO2·H2O Phosphor

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Optical Properties of NaCl:Sn²⁺Phosphor Synthesized from Aqueous NaCl/SnCl₂/HCl Solution

Optical Properties of NaCl:Sn²⁺Phosphor Synthesized from Aqueous NaCl/SnCl₂/HCl Solution

Photoluminescence Properties of SnO₂·H₂O Phosphor