Abstract
The current study focuses on the synthesis and other detailed studies on CaBi2Nb2O9 (abbreviated CBNO) phosphor doped with Dy3+ ions. The aforementioned phosphors were prepared via a solid-state reaction procedure and a comprehensive analysis of the crystal structure, particle morphology, vibrational bands, luminous characteristics, decay and thermal stability of the phosphors was done. Phase identification of the synthesized material was carried out using X-ray diffraction (XRD) technique and the optical bandgap was determined using diffuse reflectance spectra (DRS). The morphological studies and particle size estimation of the phosphor material were conducted using a scanning electron microscope (SEM). Under 452 nm excitation, the photoluminescence (PL) spectra of Dy3+-doped CBNO phosphor exhibit three peaks at 482, 576, and 666 nm, which correspond to the transitions 4F9/2 → 6H15/2, 6H13/2, and 6H11/2. The electric dipole–dipole interaction was the main mechanism for concentration quenching for Dy3+ ions. The estimated CIE chromaticity coordinates for Dy3+ ion-doped CBNO phosphors fall in the white region. The temperature-dependent PL (TD-PL) findings reveals that CBNO phosphors have a considerably superior thermal stability. The results of these investigations suggest that the CBNO phosphors doped with Dy3+ ions exhibit promising properties that could be used for prospective w-LEDs and other optoelectronic device applications.
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Data availability
The data that support the findings of this study are available on request from the corresponding author Dr. Aman Prasad. The data are not publicly available due to restrictions, e.g. their containing information that could compromise the privacy of research participants.
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Acknowledgements
The author is very thankful to CSIR-UGC for giving her a Junior Research Fellowship (UGC Ref. 1431/CSIR-UGC NET JUNE 2019). Dr. Aman Prasad is grateful to Dayalbagh Educational Institute (DEI), Deemed University, Agra for providing a Research Seed Money Grant (DEI/GBMF(3052022)/518). We are also grateful to Dr. Shayama Prasad and Dr. Manju Srivastava in the Department of Chemistry at Dayalbagh Educational Institute (DEI), Deemed University, Agra for making the FESEM facility available to us.
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Sheetal Kumari: Experimentation, data analysis, manuscript writing. Pooja Rohilla: Experimentation, data analysis. Samarthya Diwakar: Synthesis, experimentation. Rupesh Talewar: Data Analysis,
Ankur Shandilya: Data Analysis. Yasha Tayal: Experimentation, data analysis. K. Swapna: Data analysis. Aman Prasad: Work plan, supervision, review, data analysis. A.S. Rao: Data analysis, review.
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Kumari, S., Rohilla, P., Diwakar, S. et al. Synthesis, analysis and characterizations of Dy3+ ions-doped CaBi2Nb2O9 phosphors for optoelectronic device applications. J Mater Sci: Mater Electron 35, 867 (2024). https://doi.org/10.1007/s10854-024-12640-2
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DOI: https://doi.org/10.1007/s10854-024-12640-2