Synthesis and characterization of Mn2+ doped CdOZn3(PO4)2 nanocomposites

Bhaskararao, Y. Naga; Satyavathi, K.; Rao, M. Subba; Cole, Sandhya

doi:10.1016/j.molstruc.2016.11.031

Cited by 16 publications

(3 citation statements)

References 47 publications

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“…As shown in Figure , compound 1 and 2 show strong blue fluorescent emission peaks at 365 nm ( λ ex =324 nm ) and 440 nm ( λ ex =363 nm ), respectively. The photoluminescent mechanism of the two compounds is similar to those of cadmium compounds ,. The luminescence could be assigned to cluster centered emission which derived from oxygen‐to‐metal charge transfer (O→Cd) excited state.…”

Section: Resultsmentioning

confidence: 82%

Two Cadmium Germanophosphates [CdGe(μ₂ -O)(HPO₄ )₂ - (H₂ O)₂ ]^. H₂ O and Anhydrous Cd₇ Ge(PO₄ )₆ : Syntheses, Crystal Structures and Photoluminescence Properties

et al. 2017

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Two cadmium germanophosphates (GePOs), namely, [CdGe(μ2‐O)(HPO4)2(H2O)2].H2O (1) and anhydrous Cd7Ge(PO4)6 (2) have been prepared by hydro/solvothermal method. Compound 1 crystallizes in a centrosymmetric (CS) space group P‐1 with a 2D layer structure, which is composed of 1D [Cd(HPO4)4(H2O)2]∞ and [Ge(μ2‐O)2(HPO4)4]∞ infinite chains. Compound 2 crystallizes in a centrosymmetric space group R‐3 with a complicated 3D network, which is built from CdO6 octahedra, GeO6 octahedra and PO4 tetrahedra. TGA results showed that the structure of anhydrous Cd7Ge(PO4)6 was stable under 800 °C. The luminescent properties of two compounds were also investigated at room temperature. The color coordinate of 2 (0.2613, 0.2649) is close to that of the balanced white‐light emission (0.333, 0.333), which indicates that compound 2 is a good blue light emitted material at room temperature under UV irradiation exaction, thus anhydrous compound 2 might be a potential candidate for blue light‐emitted material.

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Section: Resultsmentioning

confidence: 82%

Two Cadmium Germanophosphates [CdGe(μ₂ -O)(HPO₄ )₂ - (H₂ O)₂ ]^. H₂ O and Anhydrous Cd₇ Ge(PO₄ )₆ : Syntheses, Crystal Structures and Photoluminescence Properties

et al. 2017

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“…On one hand, the observed ESR signal was attributed to the presence of manganese ions. This is supported by the fact that the ESR of Mn 2+ exhibited a signal in a region with a g -factor close to 2 [ 39 , 40 , 41 , 42 ]. However, the characteristic sextet pattern of Mn 2+ was not observed in the studied samples.…”

Section: Resultsmentioning

confidence: 92%

Co-Doping Effect of Mn2+ and Eu3+ on Luminescence in Strontiowhitlockite Phosphors

Nikiforov,

Spassky,

Krutyak

et al. 2023

Molecules

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A new series of Sr-based phosphates, Sr9−xMnxEu(PO4)7, were synthesized using the high-temperature solid-state method in air. It was found that these compounds have the same structure as strontiowhitlockite, which is a β-Ca3(PO4)2 (or β-TCP) structure. The concentration of Mn2+ ions required to form a pure strontiowhitlockite phase was determined. An unusual partial reduction of Eu3+ to Eu2+ in air was observed and confirmed by photoluminescence (PL) and electron spin resonance (ESR) spectra measurements. The PL spectra recorded under 370 nm excitation showed transitions of both 4f5d–4f Eu2+ and 4f–4f Eu3+. The total integral intensity of the PL spectra, monitored at 395 nm, decreased with increasing Mn2+ concentration due to quenching effect of Eu3+ by the Mn2+ levels. The temperature dependence of Eu2+ photoluminescence in a Sr9−xMnxEu(PO4)7 host was investigated. The conditions for the reduction of Eu3+ to Eu2+ in air were discussed.

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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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Synthesis and characterization of Mn2+ doped CdOZn3(PO4)2 nanocomposites

Cited by 16 publications

References 47 publications

Two Cadmium Germanophosphates [CdGe(μ₂ -O)(HPO₄ )₂ - (H₂ O)₂ ]^. H₂ O and Anhydrous Cd₇ Ge(PO₄ )₆ : Syntheses, Crystal Structures and Photoluminescence Properties

Two Cadmium Germanophosphates [CdGe(μ₂ -O)(HPO₄ )₂ - (H₂ O)₂ ]^. H₂ O and Anhydrous Cd₇ Ge(PO₄ )₆ : Syntheses, Crystal Structures and Photoluminescence Properties

Co-Doping Effect of Mn2+ and Eu3+ on Luminescence in Strontiowhitlockite Phosphors

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

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Synthesis and characterization of Mn2+ doped CdOZn3(PO4)2 nanocomposites

Cited by 16 publications

References 47 publications

Two Cadmium Germanophosphates [CdGe(μ2 -O)(HPO4 )2 - (H2 O)2 ]. H2 O and Anhydrous Cd7 Ge(PO4 )6 : Syntheses, Crystal Structures and Photoluminescence Properties

Two Cadmium Germanophosphates [CdGe(μ2 -O)(HPO4 )2 - (H2 O)2 ]. H2 O and Anhydrous Cd7 Ge(PO4 )6 : Syntheses, Crystal Structures and Photoluminescence Properties

Co-Doping Effect of Mn2+ and Eu3+ on Luminescence in Strontiowhitlockite Phosphors

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

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Two Cadmium Germanophosphates [CdGe(μ₂ -O)(HPO₄ )₂ - (H₂ O)₂ ]^. H₂ O and Anhydrous Cd₇ Ge(PO₄ )₆ : Syntheses, Crystal Structures and Photoluminescence Properties

Two Cadmium Germanophosphates [CdGe(μ₂ -O)(HPO₄ )₂ - (H₂ O)₂ ]^. H₂ O and Anhydrous Cd₇ Ge(PO₄ )₆ : Syntheses, Crystal Structures and Photoluminescence Properties

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