Charge compensated CaSr2(PO4)2:Sm3+, Li+/Na+/K+ phosphor: Luminescence and thermometric studies

Singh, Rajan; Bedyal, A.K.; Manhas, M.; Swart, H.C.; Kumar, Vinay

doi:10.1016/j.jallcom.2022.163793

Cited by 28 publications

(3 citation statements)

References 52 publications

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“…To check the color purity of the emission offered by A 3 (PO 4 ) 2 :Sm 3+ (A = Sr, Ca) phosphors, the color purity was calculated by using the formula given [14]:

color purity goodbreak= \frac{\sqrt{{((), x - x_{i})}^{2} + {((), y - y_{i})}^{2}}}{\sqrt{{((), x_{d} - x_{i})}^{2} + {((), y_{d} - y_{i})}^{2}}} goodbreak\times 100 %

where ( x , y ) denotes the CIE coordinates of the as‐prepared samples, sample point coordinates are denoted by ( x , y ), illuminants C coordinates are given as ( x i , y i ) = (0.310, 0.3162), the dominant wavelength for A was 587 nm wavelength and coordinates are given as ( x d , y d ) = (0.557, 0.442), and the dominant wavelength for B was 595 nm wavelength and coordinates are given as ( x d , y d ) = (0.602, 0.396).…”

Section: Resultsmentioning

confidence: 99%

“…The Sm 3+ ions serve as significant activator ions when they are introduced into different inorganic lattices and generate emission in the red, orange-red, and orange areas due to electronic transitions from excited energy level 4 G 5/2 to ground energy levels 6 H J/2 (J = 5, 7, 9, 11). It has been shown that the emission of near ultraviolet (NUV) LED chips is a good match with the normal NUV 4f absorption of Sm 3+ ions [14]. Phosphors are explored extensively and a plethora of phosphate-based phosphors such as Ca 6 BaP 4 O 17 :Sm 3+ phosphors [15,16], CsMgPO 4 :Sm 3+ [17], Ba 3 Gd(PO 4 ) 3 :Sm 3+ [18,19], Ca 2 Pb 3 (PO 4 ) 3 Cl:Sm 3+ [20], and NaBaLa 2 (PO 4 ) 3 :Sm 3+ [21] were examined for use in luminous devices including lasers and WLEDs.…”

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confidence: 99%

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Impact of ligand environment on optical, luminescence and thermometric behavior of A₃(PO₄)₂:Sm³⁺ (A = Ca, Sr) phosphors

Singh,

Manhas,

Bedyal

et al. 2023

Luminescence

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The present study investigates the impact of the ligand environment on the luminescence and thermometric behavior of Sm3+ doped A3(PO4)2 (A = Sr, Ca) phosphors prepared by combustion synthesis. The structural and luminescent properties of Sm3+ ions in the phosphate lattices were investigated using powder X‐ray diffraction (PXRD) and photoluminescence (PL) techniques. PXRD results of the synthesized phosphors exhibit the expected phases that are in agreement with their respective standards. Fourier‐transform infrared (FTIR) spectroscopy confirms the presence of PO4 vibrational bands. Upon excitation with near ultraviolet light, the PL studies indicated that Sr3(PO4)2:Sm3+ phosphors exhibit a yellow light emission, whereas Ca3(PO4)2:Sm3+ phosphors exhibit an emission of orange light. The PL emission results are in accordance with the CIE coordinates, with the Sr3(PO4)2:Sm3+ phosphors showing coordinates of (0.56, 0.44), and the Ca3(PO4)2:Sm3+ phosphors displaying coordinates of (0.60, 0.40). Thermal analysis shows improved stability of Ca3(PO4)2:Sm3+ based on lower weight reduction in thermogravimetric analysis. The effect of temperature on the luminescence properties of the phosphor has been examined upon a 405 nm excitation. By using the fluorescence intensity ratio (FIR) method, the temperature responses of the emission ratios from the Sm3+: the 4F3/2 → 6H5/2 transition to the 4G5/2 → 6H7/2 and 4F3/2 → 6H5/2 transition to the 4G5/2 → 6H9/2 emissions are characterized. The Ca3(PO4)2:Sm3+ phosphors are more sensitive as compared with the Sr3(PO4)2:Sm3+ phosphors. The earlier research findings strongly indicate that these phosphors hold great promise as ideal candidates for applications in non‐invasive optical thermometry and solid‐state lighting devices.

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“…To check the color purity of the emission offered by A 3 (PO 4 ) 2 :Sm 3+ (A = Sr, Ca) phosphors, the color purity was calculated by using the formula given [14]:

color purity goodbreak= \frac{\sqrt{{((), x - x_{i})}^{2} + {((), y - y_{i})}^{2}}}{\sqrt{{((), x_{d} - x_{i})}^{2} + {((), y_{d} - y_{i})}^{2}}} goodbreak\times 100 %

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Impact of ligand environment on optical, luminescence and thermometric behavior of A₃(PO₄)₂:Sm³⁺ (A = Ca, Sr) phosphors

Singh,

Manhas,

Bedyal

et al. 2023

Luminescence

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“…Furthermore, the ionic radii of K + and Na + are larger than that of Li + . Li + ions more easily fill the vacancy defects, which may also further promote the effective entrance of the Pr 3+ into Ca 2+ sites in the host [ 31 , 43 , 44 ]. As a consequence, the emission intensity can be significantly enhanced by the introduction of Li + ions into the host lattice.…”

Section: Resultsmentioning

confidence: 99%

Multi-Band Emission of Pr3+-Doped Ca3Al2O6 and the Effects of Charge Compensator Ions on Luminescence Properties

Hou,

Huang,

Zhang

et al. 2023

Nanomaterials

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Multi-band emission luminescence materials are of great significance owing to their extensive application in diverse fields. In this research, we successfully prepared a series of Pr3+-doped Ca3Al2O6 multi-band emission phosphors via a high-temperature solid-state method. The phase structure, morphology, luminescence spectra and decay curves were investigated in detail. The Ca3Al2O6:Pr3+ phosphors can absorb blue lights and emit lights in the 450–750 nm region, and typical emission bands are located at 488 nm (blue), 525–550 nm (green), 611–614 nm (red), 648 nm (red) and 733 nm (deep red). The influence of the Pr3+ doping concentration was discussed, and the optimal Pr3+ doping concentration was determined. The impacts of charge compensator ions (Li+, Na+, and K+) on the luminescence of Pr3+ were also investigated, and it was found that all the charge compensator ions contributed positively to the emission intensity. More importantly, the emission intensity of the as-prepared phosphors at 423 K can still maintain 65–70% of that at room temperature, and the potential application for pc-LED was investigated. The interesting results indicate that the prepared phosphors may serve multifunctional and advanced applications.

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Structural and optical analysis of Eu3+/Sm3+ co-doped zinc borosilicate glass fabricated by modified melt-quenching method

Cheong,

Zaid,

Fen

et al. 2023

J Mater Sci: Mater Electron

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Charge compensated CaSr2(PO4)2:Sm3+, Li+/Na+/K+ phosphor: Luminescence and thermometric studies

Cited by 28 publications

References 52 publications

Impact of ligand environment on optical, luminescence and thermometric behavior of A₃(PO₄)₂:Sm³⁺ (A = Ca, Sr) phosphors

Impact of ligand environment on optical, luminescence and thermometric behavior of A₃(PO₄)₂:Sm³⁺ (A = Ca, Sr) phosphors

Multi-Band Emission of Pr3+-Doped Ca3Al2O6 and the Effects of Charge Compensator Ions on Luminescence Properties

Structural and optical analysis of Eu3+/Sm3+ co-doped zinc borosilicate glass fabricated by modified melt-quenching method

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Charge compensated CaSr2(PO4)2:Sm3+, Li+/Na+/K+ phosphor: Luminescence and thermometric studies

Cited by 28 publications

References 52 publications

Impact of ligand environment on optical, luminescence and thermometric behavior of A3(PO4)2:Sm3+ (A = Ca, Sr) phosphors

Impact of ligand environment on optical, luminescence and thermometric behavior of A3(PO4)2:Sm3+ (A = Ca, Sr) phosphors

Multi-Band Emission of Pr3+-Doped Ca3Al2O6 and the Effects of Charge Compensator Ions on Luminescence Properties

Structural and optical analysis of Eu3+/Sm3+ co-doped zinc borosilicate glass fabricated by modified melt-quenching method

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Product

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Impact of ligand environment on optical, luminescence and thermometric behavior of A₃(PO₄)₂:Sm³⁺ (A = Ca, Sr) phosphors

Impact of ligand environment on optical, luminescence and thermometric behavior of A₃(PO₄)₂:Sm³⁺ (A = Ca, Sr) phosphors