The preparation and luminescence of Lu2O2S:Ce3+

Zhao, Jimin; Guo, Changxin; Zhang, Linli; Hu, Juntao

doi:10.1016/j.jlumin.2006.01.328

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…The spectra of Ce doped (Cd 0.95 -Pb 0.05 )S films [curves 4 and 5] consist of a peak at around 450 to 460 nm which is due to 4f -5d transition of Ce. A similar transition was reported by Zhao et al [22] in Lu 2 O 2 S : Ce phosphors.…”

Section: Optical Absorption Spectrasupporting

confidence: 87%

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Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Bhushan

Shrivastava

2010

Indian J Phys

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The results of photoconductivity (PC), photoluminescence (PL), optical absorption spectra, XRD and SEM studies are presented for (Cd 0.95 -Pb 0.05 )S : CdCl 2 ,Ce films prepared by chemical bath deposition technique. PC gains ~10 7 are found in doped films. PL emission spectrum is found in red region which is related to 5d to 4f transition in Ce. Films prepared at 60°C show better PC while those prepared at room temperature (RT) show better PL. Optical absorption studies show reduction in band gap due to addition of PbS. A peak due to Ce is also observed in absorption spectrum. XRD studies show the presence of both CdS and PbS. SEM studies show presence of microcrystals, cluster of grains along with some rod type structures.

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Section: Optical Absorption Spectrasupporting

confidence: 87%

“…An emission peak in the range 613-630 nm is found. This peak is quite close to 619 nm peak as observed by Zhao et al [22] in Lu 2 O 2 S : Ce phosphors due to transition from 5d state to 4f ( 2 F 5/2 ) of Ce. Therefore in the present case also, the emission can be related to such transition.…”

Section: Pl Emission Spectrasupporting

confidence: 85%

Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Bhushan

Shrivastava

2010

Indian J Phys

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“…Lu 2 O 2 S doped with rare earth ions was prepared by solid state reaction and hydrothermal methods. Zhao et al 11 prepared Lu 2 O 2 S:Ce 3+ by annealing Lu-oxalate in a reducing atmosphere with S; Wang et al 12 and Zhang et al 13 prepared Lu 2 O 2 S:Eu 3+ by annealing a hydrothermally-prepared inorganic-organic precursor in a N 2 /H 2 atmosphere. The XRDanalyses of these oxysulfides did not show impurities such as Lu 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Structure and luminescence analyses of simultaneously synthesised (Lu_1−xGd_x)₂O₂S:Tb³⁺ and (Lu_1−xGd_x)₂O₃:Tb³⁺

et al. 2017

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Herein we describe the synthesis and luminescence of nanosized (LuGd)OS:Tb and (LuGd)O:Tb phosphors with y = 0.1 mol% Tb and y = 2 mol% Tb and x ranging between 0 and 1. The concentration of Gd (x) was varied in steps of 0.1 (molar ratio Gd). The samples at 0.1 < x < 0.7 contained a mixture of (LuGd)O:Tb and (LuGd)OS:Tb, while the samples at x = 0 contained only LuO:Tb. At 0.1 < x < 0.7 LuOS:Tb and GdOS:Tb did not form a solid solution, but rather crystallised into two slightly different hexagonal structures. This behaviour has been explained in terms of segregation of Lu and Gd between the oxide and oxysulfide phases: the oxide phase is more Lu-rich whereas the second oxysulfide phase is more Gd-rich. The photoluminescence spectra of the phosphors with 0.1 mol% Tb showed a modest colour change of the fluorescence light from cyan to green when x was increased from 0 to 1, whereas the samples of the series with 2 mol% Tb yielded essentially green light. From this analysis it was concluded that the colour change of (LuGd)OS:0.1%Tb is caused by increasing energy transfer of the D-level of Tb to the charge transfer band of (LuGd)OS:Tb upon increasing x. Since the samples with 100% Lu consisted of pure cubic LuO:Tb, we had the opportunity to also study the symmetry-related PL of this compound. From this study we concluded that the C-C doublet of the TbD → F transition behaves in the same way as the corresponding doublet in cubic YO:Tb.

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“…Among these phosphors, Ce 3+ -doped yttrium aluminum garnet (YAG), which emits yellow light, has found wide use as a phosphor for white light-emitting diodes (LED). However, investigating the luminescent properties of Ce 3+ -doped compounds is of continued interest for the development of novel phosphors [1][2][3][4][5][6][7][8][9][10][11][12][13][14], particularly Ce 3+ -doped scintillators [1,2,9,14], as the allowed 5d-4f transition has a short lifetime and high quantum efficiency in the 10-40 nm range [1].…”

Section: Introductionmentioning

confidence: 99%

Microstructures and luminescent properties of Ce-doped transparent mica glass-ceramics

Taruta

Iwasaki

Nishikiori

et al. 2012

Materials Science and Engineering: B

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Transparent mica glass-ceramics were prepared by heating parent glasses that had been doped with 0.5-15 mol% CeO 2 . During the melting and heat treatment, Ce 4+ ions in the specimens were reduced to Ce 3+ ions, and one or both of these ion species were then replaced Li + ions in the interlayers of the separated mica crystals. However, scanning transmission electron microscope (STEM) and Z-contrast imaging revealed that the mica crystals did not contain the same amount of Ce. On excitation at 254 nm, the parent glasses and glass-ceramics emitted blue light, which originated from the 5d to 4f transition of the Ce 3+ ions. The emission of the glass-ceramic containing a smaller amount of Ce was attributed to the Ce 3+ ions in both the glass phase and the mica crystals, whereas that of the glass-ceramics containing a larger amount of Ce was caused mainly by Ce 3+ ions in the mica crystals. The dependence of the emission band of the parent glasses on the amount of Ce was a unique feature of the Ce-doped transparent mica glass-ceramics and was not observed in previous studies of Eu-doped parent glasses and mica glass-ceramics.

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The preparation and luminescence of Lu2O2S:Ce3+

Cited by 11 publications

References 5 publications

Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Structure and luminescence analyses of simultaneously synthesised (Lu_1−xGd_x)₂O₂S:Tb³⁺ and (Lu_1−xGd_x)₂O₃:Tb³⁺

Microstructures and luminescent properties of Ce-doped transparent mica glass-ceramics

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The preparation and luminescence of Lu2O2S:Ce3+

Cited by 11 publications

References 5 publications

Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Structure and luminescence analyses of simultaneously synthesised (Lu1−xGdx)2O2S:Tb3+ and (Lu1−xGdx)2O3:Tb3+

Microstructures and luminescent properties of Ce-doped transparent mica glass-ceramics

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Structure and luminescence analyses of simultaneously synthesised (Lu_1−xGd_x)₂O₂S:Tb³⁺ and (Lu_1−xGd_x)₂O₃:Tb³⁺