Structural and luminescent properties of CaZn2(PO4)2: RE3+ (RE = Er and Pr) nanophosphors for versatile device applications

Sarathkumar, S.; Munimasthani, Sk.; Thampy, U.S. Udayachandran; Ravikumar, R.V.S.S.N.

doi:10.1007/s10854-020-03707-x

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…Here, (x, y) denotes CIE coordinates of SYW phosphor, (x ee , y ee ) the standard white color‘s CIE coordinates, and (x d , y d ) denotes the CIE coordinates of dominant wavelength. The estimated values of CP for optimized (9.0 mol %) Er 3+ ion doped SYW phosphors is 92.3 % which is higher than the previous research [59–61] . The high colour purity of the as‐prepared phosphor makes it suitable for usage as an n‐UV pumped green emitting component in photonic devices.…”

Section: Resultsmentioning

confidence: 75%

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Kumari,

Rao,

Sinha

2024

ChemPhotoChem

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A series of Er3+ ions doped Sr9Y2W4O24 (SYW) phosphors have been synthesised using solid‐state reaction technique. For optical thermometry and solid state lighting applications, the crystal structure, morphological, and luminescence features of the SYW: Er3+ phosphors were explored. X‐ray diffraction (XRD) reveal that synthesised phosphors having single phase with a tetragonal crystal structure and I41/a space group. SEM was used to examine the morphological behaviour and presence of composition elements. The optical bandgap of the phosphor was evaluated using UV‐Vis diffuse reflection spectra (DRS). The photoluminescence (PL) emission spectra were captured under 380 nm excitation, and the peak with the maximum intensity was identified at 563 nm ascribed to transition 4S3/2 →4I15/2, that emits green color in visible region. The temperature dependent PL (TD‐PL) spectra show that SYW phosphor is substantially more thermally stable, having thermal activation energy of about 0.247 eV. Additionally, the fluorescence intensity ratio (FIR) was used to study the optical sensing characteristics of the thermal quenching transitions (2H11/2, 4S3/2) with maximum relative sensitivity (SR) and an absolute sensitivity (SA) being 1.33% K−1and 0.307% K‐1, respectively. All of the aforementioned findings demonstrate that SYW: Er3+ phosphors have potential for optical thermometry and other photonic devices.

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Section: Resultsmentioning

confidence: 75%

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Kumari,

Rao,

Sinha

2024

ChemPhotoChem

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“…Based on elements (Mn and Zn), a lot of research is being done to get the materials with the desired functional properties. [40][41][42][43][44][45][46][47][48][49] Studies on Mn-doped Zn 3 P 2 nanoparticles have not been reported so far. These factors and the interesting properties exhibited by the Mn-doped Zn 3 P 2 system are the motivation to carry out this study.…”

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confidence: 99%

Structural, Optical, and Magnetic Properties of Mn Doped Zn₃P₂ Diluted Magnetic Semiconductor Nanoparticles

Praveenkumar,

Madhusudhana Rao,

Kalyan Chakravarthi

2024

ECS J. Solid State Sci. Technol.

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Mn-doped Zn3P2-diluted magnetic semiconducting nanoparticles (Zn0.98Mn0.02P2, Zn0.96Mn0.04P2, Zn0.94Mn0.06P2, and Zn0.92Mn0.08P2) were synthesized by a conventional solid-state reaction followed by a subsequent vacuum annealing process. The formation of a tetragonal structure of pure and Mn-doped Zn3P2 was confirmed by X-ray diffraction studies, with no evidence of any further phases. Lattice parameters dicrease from a=b= 8.133 Å, c=11.459 Å to a=b=8.041 Å, c=11.410 Å with increasing dopant concentration. Scanning electron microscpy analysis indicated that all samples that underwent doping exhibited agglomeration in the scanned range of 500 nm. Energy-dispersive X-ray analysis confirmed the presence of Zn, P, and Mn in the samples, and all of the synthesized samples achieved a nearly atomic ratio. In the diffused reflectance spectra, the optical band gap increases from 1.398 to 1.418 eV with increasing dopant concentration. PL has provided evidence indicating that the emission intensity of all doped samples remains constant with increasing dopant content from x=0.02 to 0.08, with different excitation wavelengths (215 and 290 nm). Vibrating sample magnetometer tests confirmed the presence of ferromagnetic behavior at room temperature, and a positive correlation between saturation magnetization and Mn content, with the magnetic moment increasing from 0.0640 to 0.1181 emu/g with an increase in dopant content.

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Solid State Reaction Method for Nanomaterials Synthesis: A Comprehensive Review on Characterization, Properties, and Applications

Basha,

Cole,

Divakaran

et al. 2024

Springer Proceedings in Materials

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Structural and luminescent properties of CaZn2(PO4)2: RE3+ (RE = Er and Pr) nanophosphors for versatile device applications

Cited by 8 publications

References 36 publications

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Structural, Optical, and Magnetic Properties of Mn Doped Zn₃P₂ Diluted Magnetic Semiconductor Nanoparticles

Solid State Reaction Method for Nanomaterials Synthesis: A Comprehensive Review on Characterization, Properties, and Applications

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Structural and luminescent properties of CaZn2(PO4)2: RE3+ (RE = Er and Pr) nanophosphors for versatile device applications

Cited by 8 publications

References 36 publications

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Green Emission of Erbium Doped SYW Phosphors for Optical Thermometry And Solid‐State Lighting

Structural, Optical, and Magnetic Properties of Mn Doped Zn3P2 Diluted Magnetic Semiconductor Nanoparticles

Solid State Reaction Method for Nanomaterials Synthesis: A Comprehensive Review on Characterization, Properties, and Applications

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Structural, Optical, and Magnetic Properties of Mn Doped Zn₃P₂ Diluted Magnetic Semiconductor Nanoparticles