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Bright blue emissions on UV-excitation of LaBO3 (B=In, Ga, Al) perovskite structured phosphors for commercial solid-state lighting applications

B. V. Naveen Kumar, T. Samuel, Samatha Bevara, K. Ramachandra Rao, Satya Kamal Chirauri

Abstract


Bright blue photoluminescence (PL) was obtained from Bi3+-activated LaBO3 (B = In, Ga, Al) perovskite nanophosphors. A cost-effective and low-temperature chemical route was employed for preparing Bi3+ doped LaBO3 (B=In, Ga, Al) which were then annealed at 1000 °C. The phase formation, morphological studies and luminescent properties of the as-prepared samples were performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence and optical absorption spectroscopy. Comparison of emission intensities, lifetime studies, energy band gaps and color purity of all samples (pure and Bi3+ doped) were investigated for promising applications in UV light-emitting diodes, variable frequency drive (VFD), field emission display (FED), and other photoelectric fields.


Keywords


perovskites; photoluminescence; phosphor; quenching; solid-state lightning

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References


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DOI: https://doi.org/10.15826/chimtech.2022.9.1.07

Copyright (c) 2022 B.V. Naveen Kumar, T. Samuel, Samatha Bevara, K. Ramachandra Rao, Satya Kamal Chirauri

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Chimica Techno Acta, 2014-2022
ISSN 2411-1414 (Online)