Luminescence and EPR studies of Y2O3:Gd3+ phosphors prepared via solution combustion method

Singh, Vijay; Chakradhar, R.P.S.; Rao, J.L.; Ledoux‐Rak, Isabelle; Kwak, Ho‐Young

doi:10.1007/s10853-010-4869-6

Cited by 29 publications

(6 citation statements)

References 36 publications

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“…The PL spectrum under the excitation at 275 nm shows a sharp and intense peak at 314 nm due to the 6 P 7/2 → 8 S 7/2 transition in Gd 3+ ions (31) used for treating skin diseases. The emission band positions observed were in good agreement with the emission band positions reported previously in the literature (38). The emission transitions 6 P J → 8 S 7/2 occur over an energy gap of about 32,000 cm -1 .…”

Section: Pl Emission Of Gd 3+ In M 2 O 2 Ssupporting

confidence: 91%

UVB‐emitting Gd³⁺‐activated M₂O₂S (where M = La, Y) for phototherapy lamp phosphors

2015

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Gd(3+)-activated oxysulphide (M2O2S) may be used to study Photoluminescence (PL) properties with respect to phototherapy. Gd(3+)-activated phosphor materials are widely used for phototherapy lamps. The Gd(3+) ion gives characteristic Narrow-Band (NB) emissions, in particular in the ultraviolet (UV) light region, that are used to treat more than 50 types of skin diseases. In this paper, M2O2S oxysulphide doped with Gd(3+) was synthesized by the solid-state flux fusion method and its down conversion spectral properties were studied as a function of different Gd(3+) concentrations. The sample was characterized by X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and PL and the crystal structure was also studied. The lanthanum oxysulphide (La2O2S)-activated Gd(3+) ion showed a sharp emission peak at 314 nm when excited at 275 nm excitation, whereas the yttrium oxysulphide (Y2O2S)-activated Gd(3+) ion showed a sharp emission at 316 nm when excited by 272 nm. The effect of concentration of the Gd(3+) ion on the luminescence properties of M2O2S:Gd(3+) phosphor was also studied. These phosphor materials activated with the Gd(3+) ion may be suitable for phototherapy lamps, which are used to treat many types of skin diseases such as psoriasis, vitiligo, or scleroderma.

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Section: Pl Emission Of Gd 3+ In M 2 O 2 Ssupporting

confidence: 91%

UVB‐emitting Gd³⁺‐activated M₂O₂S (where M = La, Y) for phototherapy lamp phosphors

2015

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“…The emission spectrum also exhibited a weak emission band at 308 nm, and this band has been attributed to the 6 P 5/2 → 8 S 7/2 transition. The observed emission-band positions are in good agreement with the emission-band positions that are reported elsewhere [50][51][52]. Shinde et al [49] did not observe any emissions in the visible range, with the UV region showing the only observable emissions; they observed two peaks centred at 308 and 314 nm.…”

Section: Introductionsupporting

confidence: 90%

Ultraviolet B emission from a $$\hbox {Gd}^{3+}$$ Gd 3 + -doped $$\hbox {BaAl}_{2}\hbox {O}_{4}$$

Singh

Sivaramaiah²,

Singh

et al. 2019

Bull Mater Sci

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A BaAl 2 O 4 :Gd 3+ phosphor was successfully prepared using a combustion technique. An X-ray diffraction pattern was used to characterize the resultant phosphor, and the photoluminescence (PL) of the prepared BaAl 2 O 4 :Gd 3+ was studied. Under a 273-nm excitation, the main emission peak of the phosphor is located at 314 nm, and this is attributed to the 6 P 7/2 → 8 S 7/2 transition of Gd 3+. Electron paramagnetic resonance (EPR) spectrum appears to be U-shaped, and lines are evident at g eff ∼ 2.14, 4.56 and 6.75. The PL and EPR analyses indicate the presence of Gd as Gd 3+ in this sample.

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“…7). The EPR spectra exhibit one prominent line with effective g value as g $ 2.02 which matches well with that reported from Gd 3þ ions in lattice positions with strong cubic symmetry [12][13][14][15] position reduces the effective spin concentration. Hence, EPR and magnetic measurements unambiguously point to the fact that EPR resonance and paramagnetic behavior in undoped and Tb doped KGP microparticles are due to Gd 3þ .…”

supporting

confidence: 85%

Luminomagnetic K₂ Gd₁₋ _x Zr(PO₄ )₃ :Tb_x ³⁺ phosphor with intense green fluorescence and paramagnetism

Kumar

Shanker

Kotnala

et al. 2013

Phys. Status Solidi A

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Luminescence and EPR studies of Y2O3:Gd3+ phosphors prepared via solution combustion method

Cited by 29 publications

References 36 publications

UVB‐emitting Gd³⁺‐activated M₂O₂S (where M = La, Y) for phototherapy lamp phosphors

UVB‐emitting Gd³⁺‐activated M₂O₂S (where M = La, Y) for phototherapy lamp phosphors

Ultraviolet B emission from a $$\hbox {Gd}^{3+}$$ Gd 3 + -doped $$\hbox {BaAl}_{2}\hbox {O}_{4}$$

Luminomagnetic K₂ Gd₁₋ _x Zr(PO₄ )₃ :Tb_x ³⁺ phosphor with intense green fluorescence and paramagnetism

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Luminescence and EPR studies of Y2O3:Gd3+ phosphors prepared via solution combustion method

Cited by 29 publications

References 36 publications

UVB‐emitting Gd3+‐activated M2O2S (where M = La, Y) for phototherapy lamp phosphors

UVB‐emitting Gd3+‐activated M2O2S (where M = La, Y) for phototherapy lamp phosphors

Ultraviolet B emission from a $$\hbox {Gd}^{3+}$$ Gd 3 + -doped $$\hbox {BaAl}_{2}\hbox {O}_{4}$$

Luminomagnetic K2 Gd1− x Zr(PO4 )3 :Tb x 3+ phosphor with intense green fluorescence and paramagnetism

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UVB‐emitting Gd³⁺‐activated M₂O₂S (where M = La, Y) for phototherapy lamp phosphors

UVB‐emitting Gd³⁺‐activated M₂O₂S (where M = La, Y) for phototherapy lamp phosphors

Luminomagnetic K₂ Gd₁₋ _x Zr(PO₄ )₃ :Tb_x ³⁺ phosphor with intense green fluorescence and paramagnetism