Intense visible light emission from dysprosium (Dy3+) doped barium titanate (BaTiO3) phosphor and its thermoluminescence study

Singh, Rajni; Kaur, Jaspreet; Bose, Purna; Shrivastava, Ravi; Dubey, Vikas; Parganiha, Yogita

doi:10.1007/s10854-017-7212-z

Cited by 12 publications

(2 citation statements)

References 22 publications

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“…A variety of synthesis temperatures have been reported for BaTiO 3 in the literature. For example, BaTiO 3 has been synthesized at 1000 °C, 39 1100 °C, 40 1200 °C, 41 1300 °C, 42 and 1400 °C. 43 Here we focus on the effect of how many heating steps are used in the synthesis of BaTiO 3 .…”

Section: Discussionmentioning

confidence: 99%

Machine-Learning Rationalization and Prediction of Solid-State Synthesis Conditions

Huo

Bartel

et al. 2022

Chem. Mater.

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There currently exist no quantitative methods to determine the appropriate conditions for solid-state synthesis. This not only hinders the experimental realization of novel materials but also complicates the interpretation and understanding of solid-state reaction mechanisms. Here, we demonstrate a machine-learning approach that predicts synthesis conditions using large solid-state synthesis data sets text-mined from scientific journal articles. Using feature importance ranking analysis, we discovered that optimal heating temperatures have strong correlations with the stability of precursor materials quantified using melting points and formation energies (Δ G f , Δ H f ). In contrast, features derived from the thermodynamics of synthesis-related reactions did not directly correlate to the chosen heating temperatures. This correlation between optimal solid-state heating temperature and precursor stability extends Tamman’s rule from intermetallics to oxide systems, suggesting the importance of reaction kinetics in determining synthesis conditions. Heating times are shown to be strongly correlated with the chosen experimental procedures and instrument setups, which may be indicative of human bias in the data set. Using these predictive features, we constructed machine-learning models with good performance and general applicability to predict the conditions required to synthesize diverse chemical systems.

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Section: Discussionmentioning

confidence: 99%

Machine-Learning Rationalization and Prediction of Solid-State Synthesis Conditions

Huo

Bartel

et al. 2022

Chem. Mater.

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“…48,49 The optical properties of Dy doped glasses have been reported to be a promising materials for two-color phosphors and white light emission as Dy 3+ ion possesses intense emissions at blue (488 nm, 4F9/2➝6H15/2), green (544 nm, 4F9/2➝6H13/2) and red (621 nm, 4F9/2➝6H11/2) regions. 50,51 The Dysprosium ion is well known as to behave amphoteric in nature due to its intermediate ionic radius z E-mail: badapanda.tanmaya@gmail.com ECS Journal of Solid State Science and Technology, 2021 10 093003 among the rare earth elements and can occupy different sites in the lattice according to the Ba/Ti ratio. 16,52 Makovec et al have investigated the solubility of Dy in the both Ba site and Ti site in Ti-rich BaTiO 3 samples and Ba rich samples respectively.…”

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confidence: 99%

Investigation of Structural, Dielectric, and Optical Behaviour of Dysprosium-Doped Barium Titanate Ceramics

Mahapatra

Badapanda

Sarangi

2021

ECS J. Solid State Sci. Technol.

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The influence of Dysprosium (Dy) doping on the structure, dielectric and optical properties of the BaTiO 3 system has been investigated in the manuscript. The solid-state reaction method was employed to prepare ceramics with compositions of Ba 1−x Dy 2x/3 TiO 3 (x = 0.0, 0.01, 0.025, 0.05, 0.075, and 0.1). X-ray diffraction (XRD) structural analysis was carried out, showing complete dissemination of Dysprosium in the BaTiO 3 lattice with a tetragonal symmetry. Close investigation of the XRD pattern revealed the existence of a small secondary phase above x ⩾ 0.025. Microstructure was analyzed using scanning electron microscopy, showing that grain growth was suppressed by the incorporation of Dysprosium. Raman spectra further confirmed crystal symmetry and existence of a secondary phase for higher doping concentrations. Dielectric behavior was studied with variations of frequency and temperature. The temperature variant dielectric constant and dielectric loss represent a decrease of dielectric constant and loss with a rise in dysprosium content with a slight variation of transition temperature. Temperature coefficient of capacitance values for all compositions were calculated. The diffusivity parameter for all compositions was obtained using modified Curie-Weiss law and an enhancement in diffusivity was observed with increased dysprosium content. The optical behaviour of the doped samples was studied via UV-visible spectroscopy and the optical band gap was found to decrease with doping.

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Photoluminescence Studies of Bluish-White Emission from Dy3+-Activated Li2CaSiO4 Phosphor

et al. 2023

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Intense visible light emission from dysprosium (Dy3+) doped barium titanate (BaTiO3) phosphor and its thermoluminescence study

Cited by 12 publications

References 22 publications

Machine-Learning Rationalization and Prediction of Solid-State Synthesis Conditions

Machine-Learning Rationalization and Prediction of Solid-State Synthesis Conditions

Investigation of Structural, Dielectric, and Optical Behaviour of Dysprosium-Doped Barium Titanate Ceramics

Photoluminescence Studies of Bluish-White Emission from Dy3+-Activated Li2CaSiO4 Phosphor

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