Effect of Pr doping on the optical and magnetic properties of calcium stannate perovskite nanostructures

Manoharan, Avinash; Munusamy, Muralidharan; Pradeep, Ajaykumari; Sellaiyan, S.; Hussain, Shamima; Krishnan, Sivaji

doi:10.1007/s00339-020-04061-9

Cited by 7 publications

(1 citation statement)

References 69 publications

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“…The structural parameters determined for CSO are in close agreement with the literature . In the literature, the unit cell volume was seen to marginally reduce with Eu 3+ doping in CSO, while it was shown to increase marginally in Nd 3+ and Pr 3+ doping. , As seen from Table , the unit cell volume is marginally higher in doped samples. The higher unit cell volume suggests that Eu 3+ might be occupying both Ca 2+ and Sn 4+ sites.…”

Section: Results and Discussionsupporting

confidence: 85%

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO₃ Perovskite through Efficient Photon Utilization and Local Site Engineering

Gupta

Modak

Das

et al. 2021

ACS Appl. Electron. Mater.

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Significant research has been carried out in ABO 3 perovskites during last decades in tailoring their luminescence properties for advanced optoelectronics. However, research related to exploring contribution of defects, both cation and anion vacancies in photoluminescence for multicolor photon emission has never been explored. Here, in this work, we have harnessed the full gamut of light emission from violet-blue to deep red originating from oxygen vacancies (OVs) in undoped CaSnO 3 (CSO) and Eu@CaO 8 and Eu@SnO 6 sites in the doped CaSnO 3 :Eu 3+ (CSOE) perovskite. Any contribution of Sn 2+ and Eu 2+ , respectively, in photoluminescence of CSO and CSOE has been completely ruled out through Xray absorption near-edge structure. Synchrotron radiation-based extended Xray absorption fine structure and positron annihilation lifetime spectroscopy showed simultaneous distribution of Eu 3+ ions at both asymmetric CaO 8 and symmetric SnO 6 sites owing to a very high negative formation energy value of −6.56 eV for the same. By efficient photon utilization arising from two different charge transfer bands, axial oxygen of SnO 6 octahedra O1 → Eu 3+ CTB (∼250 nm) preferentially transfers energy to Eu@CaO 8 leading to intense electric dipole transition, whereas equatorial oxygen of SnO 6 octahedra O2 → Eu 3+ CTB (∼300 nm) excites Eu@SnO 6 leading to intense magnetic dipole transition. This analogy is confirmed by DFT, wherein it was found that the calculated energy difference between the valence band maxima and conduction band minima is 4.77 eV (∼250 nm) and 4.3 eV (∼300 nm) for Eu@Ca and Eu@Sn sites, respectively. This concept of site-selective excitation and local site engineering can be applied to a variety of optical materials, which provides a unique strategy for tuning other properties of multifunctional crystals that are highly sensitive to the dopant's local environment.

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Section: Results and Discussionsupporting

confidence: 85%

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO₃ Perovskite through Efficient Photon Utilization and Local Site Engineering

Gupta

Modak

Das

et al. 2021

ACS Appl. Electron. Mater.

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Enrichment of piezoelectric properties in Nb5+doped (0.94) (Na0.5Bi0.5)TiO3–(0.06) BaTiO3 ceramics across morphotropic phase boundary region

Sudhakar¹,

Carry²,

Logeswari³

et al. 2021

J Mater Sci: Mater Electron

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Synthesis and investigation of (1 − x)K0.5Na0.5NbO3–(x)CaSnO3 lead free perovskite ceramics of high dielectric and piezoelectric properties for transducer applications

Kannan

Logeswari²,

Carry³

et al. 2021

J Mater Sci: Mater Electron

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Effect of Pr doping on the optical and magnetic properties of calcium stannate perovskite nanostructures

Cited by 7 publications

References 69 publications

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO₃ Perovskite through Efficient Photon Utilization and Local Site Engineering

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO₃ Perovskite through Efficient Photon Utilization and Local Site Engineering

Enrichment of piezoelectric properties in Nb5+doped (0.94) (Na0.5Bi0.5)TiO3–(0.06) BaTiO3 ceramics across morphotropic phase boundary region

Synthesis and investigation of (1 − x)K0.5Na0.5NbO3–(x)CaSnO3 lead free perovskite ceramics of high dielectric and piezoelectric properties for transducer applications

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Effect of Pr doping on the optical and magnetic properties of calcium stannate perovskite nanostructures

Cited by 7 publications

References 69 publications

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO3 Perovskite through Efficient Photon Utilization and Local Site Engineering

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO3 Perovskite through Efficient Photon Utilization and Local Site Engineering

Enrichment of piezoelectric properties in Nb5+doped (0.94) (Na0.5Bi0.5)TiO3–(0.06) BaTiO3 ceramics across morphotropic phase boundary region

Synthesis and investigation of (1 − x)K0.5Na0.5NbO3–(x)CaSnO3 lead free perovskite ceramics of high dielectric and piezoelectric properties for transducer applications

Contact Info

Product

Resources

About

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO₃ Perovskite through Efficient Photon Utilization and Local Site Engineering

Light Harvesting from Oxygen Vacancies and A- and B-Site Dopants in CaSnO₃ Perovskite through Efficient Photon Utilization and Local Site Engineering