Synthesis and luminescence properties of MgO: Sm 3+  phosphor for white light-emitting diodes

Kiran, N.; Baker, Adam; Wang, Gui‐Gen

doi:10.1016/j.molstruc.2016.09.046

Cited by 39 publications

(6 citation statements)

References 24 publications

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“…Various studies have been carried out on Eu 3+ doped phosphors with red emission [17,18] and also Sm 3+ doped phosphors with reddish-orange emission [19][20][21][22]. In this paper, we reported the study of luminescence and Judd-Ofelt analysis of La 1-x Sm x OCl (x=0.00, 0.01, 0.03, 0.05, 0.07, 0.09) Nano phosphor synthesized via solid state which was carried out for short duration and at low temperature.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photoluminescence properties of Sm³⁺ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Yashodha

Dhananjaya

Manjunath

2019

Mater. Res. Express

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Present paper reports the study on luminescence and optical behaviour of samarium doped lanthanum oxychloride (LaOCl:Sm 3+ ) nanophosphor for their potentiality in display devices. The conventional solid state route was employed to synthesize the phosphor La 1-x Sm x OCl (x=0, 0.01, 0.03, 0.05, 0.07 and 0.09). Tetragonal phase of the prepared compound was confirmed by PXRD. An agglomerated and spherical like structure were seen of the samples from FE-SEM analysis. The Wood and Tauc relation was employed to find out band gap energy and is around 4.23 eV. At an excitation wavelength of 408 nm, a high intense peak of emission was observed at 608 nm for transitions ( 4 G 5/2 → 6 H 7/2 ) of Sm 3+ ions in the PL spectra. Colour co-ordinates (X,Y) were used for the analysis of measured photoluminescence spectra. For the optimized concentration of Sm 3+ (La 1-x Sm x OCl with x=0.05), the intensity parameters (Ω 2 , Ω 4 and Ω 6 )were determined. The trend of Ω 6 >Ω 4 >Ω 2 was observed. An emission cross section and Branching ratio are found to be 3.98×10 −22 cm 2 and 59% respectively for 4 G 5/2 → 6 H 7/2 transition that makes it suitable for laser designs and application. The obtained results reveal that the LaOCl phosphor doped with samarium can be used on the screens of optical electronic systems and also is suitable for emission of reddish orange colour.

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Section: Introductionmentioning

confidence: 99%

Synthesis and photoluminescence properties of Sm³⁺ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Yashodha

Dhananjaya

Manjunath

2019

Mater. Res. Express

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“…2(d), which are assigned to Sm 3+ f-f electronic transitions, 4 G 5/2 -6 H 5/2 (B567 nm) and 4 G 5/2 -6 H 7/2 (B600 nm), repectively. [39][40][41] S5 and S6 (ESI †) further observes that the 567 nm and 600 nm PL peaks arise from Sm 3+ dopants. As shown in Fig.…”

Section: Resultsmentioning

confidence: 77%

“…2(c) shows fluorescence emission from 400 nm to 700 nm of Cs 2 AgInCl 6 :Sm phosphors with various doping concentrations of Sm 3+ under excitation 370 nm, including two obvious characteristic peaks caused by the 4 G 5/2 -6 H 5/2 (B567 nm) and 4 G 5/2 -6 H 7/2 (B600 nm) transitions of Sm 3+ ions, respectively. [39][40][41] At the same time, emission intensities show different responses to the Sm 3+ ion concentration as the strongest luminescence was found in the sample with 20% samarium(III) acetate hydrate addition. But the improvement is very limited because the f-f transition of Sm 3+ is parity forbidden.…”

Section: Resultsmentioning

confidence: 99%

Bi³⁺ and Sm³⁺ co-doped Cs₂AgInCl₆ perovskite microcrystals with co-enhancement of fluorescence emission

Rao

Zhao

et al. 2022

New J. Chem.

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“…5 Sm 3+ ion-doped glasses have been extensively investigated by optical spectroscopy 6 , for the development of orange-red phosphors because of their potential applications in color displays, plasma display panels, and solid-state lighting. 7,8 Sm 3+ serves as one of the best activators/dopants for orange-red emission to increase the efficiency of white light emitting diode (w-LEDs). 9 Moreover, the orange-red emission is not affected by nonradiative multiphonon relaxation processes in host with high phonon energy because the large energy difference (≈ 7000 cm −1 ) between 4 G 5/2 and the next lower level 6 F 11/2 .…”

Section: Introductionmentioning

confidence: 99%

“…Sm 3+ ion‐doped glasses have been extensively investigated by optical spectroscopy 6 , for the development of orange‐red phosphors because of their potential applications in color displays, plasma display panels, and solid‐state lighting 7,8 . Sm 3+ serves as one of the best activators/dopants for orange‐red emission to increase the efficiency of white light emitting diode (w‐LEDs) 9 .…”

Section: Introductionmentioning

confidence: 99%

Structure and luminescent properties of Sm/Dy‐doped Sr₂MgSi₂O₇ glass–ceramics

Fernández‐Rodríguez

Balda

Fernández

et al. 2022

Int J of Appl Glass Sci

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Sm 3+ -doped and Sm 3+ /Dy 3+ codoped SiO 2 -SrO-MgO glasses were prepared by conventional melt quenching and Sr 2 MgSi 2 O 7 based glass-ceramics from sintering and crystallization of the glass powders. The thermal, structural, and optical properties of the glasses and glass-ceramics were investigated as a function of the dopant concentration. The optical characterization includes the photoluminescence spectra and the lifetimes of the 4 G 5/2 (Sm 3+ ) and 4 F 9/2 (Dy 3+ ) excited states. In Sm 3+ single-doped samples, the emission intensity increases up to a concentration of 0.3 mol% Sm 3+ ions and then decreases due to nonradiative energy transfer processes. The emission spectra in the glass-ceramics show a more resolved structure and higher intensity compared to the glass samples, suggesting a different and crystalline environment for the Sm 3+ ions. The non-radiative processes also influence the experimental decays of the glass samples which deviate from a single exponential with lifetimes decreasing as Sm 3+ concentration increases. The emission and excitation spectra of the codoped samples do not show significant energy transfer between Sm 3+ and Dy 3+ ions. Different emitting colors can be obtained in the codoped glasses by changing the excitation wavelength. The studied glass-ceramics could be applied as enamels on ceramic or metallic substrates.

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Synthesis and luminescence properties of MgO: Sm 3+ phosphor for white light-emitting diodes

Cited by 39 publications

References 24 publications

Synthesis and photoluminescence properties of Sm³⁺ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Synthesis and photoluminescence properties of Sm³⁺ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Bi³⁺ and Sm³⁺ co-doped Cs₂AgInCl₆ perovskite microcrystals with co-enhancement of fluorescence emission

Structure and luminescent properties of Sm/Dy‐doped Sr₂MgSi₂O₇ glass–ceramics

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Synthesis and luminescence properties of MgO: Sm 3+ phosphor for white light-emitting diodes

Cited by 39 publications

References 24 publications

Synthesis and photoluminescence properties of Sm3+ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Synthesis and photoluminescence properties of Sm3+ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Bi3+ and Sm3+ co-doped Cs2AgInCl6 perovskite microcrystals with co-enhancement of fluorescence emission

Structure and luminescent properties of Sm/Dy‐doped Sr2MgSi2O7 glass–ceramics

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Synthesis and photoluminescence properties of Sm³⁺ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Synthesis and photoluminescence properties of Sm³⁺ doped LaOCl phosphor with reddish orange emission and it’s Judd- Ofelt analysis

Bi³⁺ and Sm³⁺ co-doped Cs₂AgInCl₆ perovskite microcrystals with co-enhancement of fluorescence emission

Structure and luminescent properties of Sm/Dy‐doped Sr₂MgSi₂O₇ glass–ceramics