VUV and UV photoluminescence of green emitting Sr2P2O7:Tb3+ phosphors for PDP applications

Singh, Vijay; Kadam, Abhijeet R.; Dhoble, S.J.; Jeong, Hakyung

doi:10.1016/j.ijleo.2021.167396

Cited by 15 publications

(19 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the colour purity of the phosphors was enhanced with respect to the Eu 3+ concentration. Colour purity of the proposed phosphor was calculated using the formula [ 51–53 ] :

italicColour purity goodbreak= \frac{\sqrt{{((), X goodbreak- X_{i})}^{2} + {((), Y goodbreak- Y_{i})}^{2}}}{\sqrt{{((), X_{d} goodbreak- X_{i})}^{2} + {((), Y_{d} goodbreak- Y_{i})}^{2}}} * 100 %

where, (x, y) and (x i , y i ) are the colour coordinates of the sample point and CIE equal‐energy illuminant, respectively; (x d , y d ) are the chromaticity coordinates of the dominant wavelength of the light source.…”

Section: Resultsmentioning

confidence: 99%

“…[29] Crystal structure and phase parameters for YZO phosphors were determined using Rietveld refinement and FullProf suite software and are F I G U R E 1 XRD pattern of YZO phosphors doping with Eu 3+ , Sm 3+ and Sm 3+ ÀEu 3+ compared with standard ICSD database of Y 2 Zr 2 O 7 displayed in Figure 2. [5,[30][31][32][33] The consistency factors are R wp = 18.21, R p = 10.36, R exp = 13.93, and χ 2 = 3.21 which are within well acceptable limits. The refinement analysis verified that the YZO phosphor had a cubic structure and belonged to the Fd3m space group (a = b = c = 10.33500 Å, and α = β = γ = 90.00 ).…”

Section: Phase and Crystal Analysismentioning

confidence: 98%

See 1 more Smart Citation

Luminescence study of Sm³⁺,Eu³⁺‐doped Y₂Zr₂O₇ host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

et al. 2022

Self Cite

View full text Add to dashboard Cite

Pyrochlore phosphors have shown their worth in modern day lighting in the last few years. Colour tunability of the phosphor is one of the modern techniques used to obtain white light‐emitting diodes (WLEDs). In the proposed work, Y2Zr2O7:Sm3+,Eu3+ phosphors were investigated for WLED applications as well as display devices. A convectional solid‐state diffusion method was used to synthesize the proposed phosphors. X‐ray diffraction of the proposed phosphors was performed and compared with the standard Inorganic Crystal Structure Database. The crystal structure of the sample was cubic in nature, obtained from Rietveld refinement. Vibrational and morphological studies on the samples were carried out using Fourier transform infrared spectroscopy and scanning electron microscopy analysis. The photoluminescence study of the colour tunable phosphor showed the characteristic peak of Sm3+ together with the two sharp peaks of Eu3+ ions. Greenish yellow to red colour tunability was observed in the proposed phosphor with enhancement of Eu3+ ions. All these results showed the worth of this sample for WLEDs applications as well as in display devices.

show abstract

“…However, the colour purity of the phosphors was enhanced with respect to the Eu 3+ concentration. Colour purity of the proposed phosphor was calculated using the formula [ 51–53 ] :

italicColour purity goodbreak= \frac{\sqrt{{((), X goodbreak- X_{i})}^{2} + {((), Y goodbreak- Y_{i})}^{2}}}{\sqrt{{((), X_{d} goodbreak- X_{i})}^{2} + {((), Y_{d} goodbreak- Y_{i})}^{2}}} * 100 %

Section: Resultsmentioning

confidence: 99%

Section: Phase and Crystal Analysismentioning

confidence: 98%

Luminescence study of Sm³⁺,Eu³⁺‐doped Y₂Zr₂O₇ host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Table 1 reveals a comparison of colour purity for the optimized Tb 3+ ion‐doped Na 4 Ca 4 Si 6 O 18 and other phosphor materials reported elsewhere under UV and n‐UV excitations. [ 58–62 ] Among various phosphors, the presented NCMS:Tb 3+ phosphor showed excellent green emission to use as one component for developing efficient pc‐w‐LEDs.…”

Section: Resultsmentioning

confidence: 99%

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Chauhan

Jayasimhadri

2022

Luminescence

View full text Add to dashboard Cite

Tb3+‐doped Na4Ca4Si6O18 (NCMS:Tb3+) phosphors were synthesized using a solid‐state reaction route with increasing dopant concentration. The phase identification studies for NCMS:Tb3+ phosphors were carried out using an X‐ray diffraction (XRD) technique. The XRD patterns for the as‐synthesized phosphors showed satisfactory agreement with the standard pattern (JCPDS card no. 75‐1687) for the pure phase of the Na4Ca4Si6O18 compound. The morphology and size of particles were illustrated from scanning electron microscope (SEM) micrographs. The photoluminescence excitation (PLE) spectrum of Tb3+‐doped Na4Ca4Si6O18 phosphor depicts the strong excitation peak obtained in the UV spectral region. The trivalent terbium‐activated NCMS phosphors excited in the UV region (232 nm wavelength) exhibited intense emission in the blue (350–470) and green (470–650) spectral regions. When increasing the concentration of Tb3+ ions in the host matrix, the emission colour shifted from the blue to the green region due to cross‐relaxation energy transfer (CRET) mechanisms and showed the tunable behaviour of the Tb3+‐activated as‐synthesized NCMS phosphor. These results demonstrated that the Tb3+‐activated sodium calcium metasilicate phosphor has immense potential to contribute as a green‐ and blue–green‐emitting component in lighting and display device applications.

show abstract

“…The CIE chromaticity coordinates were estimated as a function of the PL emission spectra for the Sm 3+ -doped Ca phosphor sample was calculated using the relationship [30][31][32][33] :…”

Section: Commission Internationale De L'éclairage (Cie) Chromaticitymentioning

confidence: 99%

Combustion‐assisted Ca_8.25Na_1.5Al₆O₁₈:Sm³⁺ phosphors for solid‐state lighting and WLED applications

2022

View full text Add to dashboard Cite

Aluminate‐based phosphors have been the most investigated luminescent phosphors over decades due to their outstanding optical properties. In the proposed work, a series of Sm3+‐doped Ca8.25Na1.5Al6O18 (CNAO) phosphor sample was prepared using a simple combustion technique with the help of two fuels i.e., urea–glycine. The purity of phase and structural analysis of the CNAO phosphors were confirmed using X‐ray diffraction analysis. Vibrational features of this phosphors confirmed were via Fourier transform infrared analysis. A photoluminescence study of this phosphor showed a doublet emission at 568 and 576 nm in the yellow region attributable to the 4G5/2→6H5/2 transition of Sm3+ ions, whereas a doublet peak noticed in red region ranged from 600 to 620 nm and was attributable to the 4G5/2→6H7/2 transition of Sm3+ ions. Moreover, Commission Internationale de l'éclairage colour coordinates were also located in the yellowish‐red region and confirmed the potential of this phosphor as a yellowish‐red component for white light‐emitting diodes and display devices applications.

show abstract

VUV and UV photoluminescence of green emitting Sr2P2O7:Tb3+ phosphors for PDP applications

Cited by 15 publications

References 22 publications

Luminescence study of Sm³⁺,Eu³⁺‐doped Y₂Zr₂O₇ host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

Luminescence study of Sm³⁺,Eu³⁺‐doped Y₂Zr₂O₇ host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Combustion‐assisted Ca_8.25Na_1.5Al₆O₁₈:Sm³⁺ phosphors for solid‐state lighting and WLED applications

Contact Info

Product

Resources

About

VUV and UV photoluminescence of green emitting Sr2P2O7:Tb3+ phosphors for PDP applications

Cited by 15 publications

References 22 publications

Luminescence study of Sm3+,Eu3+‐doped Y2Zr2O7 host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

Luminescence study of Sm3+,Eu3+‐doped Y2Zr2O7 host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

UV‐excited blue‐ to green‐emitting Tb3+‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Combustion‐assisted Ca8.25Na1.5Al6O18:Sm3+ phosphors for solid‐state lighting and WLED applications

Contact Info

Product

Resources

About

Luminescence study of Sm³⁺,Eu³⁺‐doped Y₂Zr₂O₇ host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

Luminescence study of Sm³⁺,Eu³⁺‐doped Y₂Zr₂O₇ host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Combustion‐assisted Ca_8.25Na_1.5Al₆O₁₈:Sm³⁺ phosphors for solid‐state lighting and WLED applications