Abstract
This paper reports the synthesis, structural, thermal and luminescence properties of Sr1−xZrSi2O7:xEu3+ (x = 0.01 ≤ x ≤ 0.05 mol) phosphors by solid-state reaction method in air. The optimal Eu3+ ion concentration in Sr1−xZrSi2O7:xEu3+ phosphor is 0.04 mol. The monoclinic crystal structure with P21/c space group was confirmed by the powder X-ray diffractometry (PXRD) technique. Thermal behavior of the present phosphors was investigated which shows better characteristics. Under 396 nm excitation, Eu3+ ions activated Sr1−xZrSi2O7 phosphors exhibited a strong red emission centered at 617 nm due to the f–f transition of 5D0 → 7F2 transition. The critical doping concentration of Eu3+ ion was x = 0.04 mol and the critical distance was determined as 19.1117 Å. The energy transfer among Eu3+ ions in Sr1−xZrSi2O7 phosphors was found to be a dipole–dipole interaction. Consequently, optimal phosphor shows a thermal stability up to 420 K, superior to that in analogous reports. And the quantum efficiency of prepared Sr1−xZrSi2O7:xEu3+ phosphor with 396 nm excitation was calculated to be nearly 72%. The photometric results indicate that the synthesized Orange-Red phosphor can be potentially applicable for solid-state lighting and display devices applications.
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Acknowledgements
The corresponding author; Dr. Ishwar Prasad Sahu, would like to acknowledge the Science & Engineering Research Board (SERB), New Delhi, Government of India for funding FTIR Spectrophotometer (CRG/2018/004139). This instrument is used for the IR spectroscopic analysis of the prepared sample from the study.
Funding
This work was supported by UGC-BSR Start-up Fellowship: No. F.30–420/2018 (BSR), dated 23/10/2018, the Corresponding Author Dr. Ishwar Prasad Sahu, has received research support from University Grant commission (UGC), New Delhi, Government of India.
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Ishwar Prasad Sahu and Manorama Sahu: Investigate, designed the whole research, Conceptualization, synthesized all the samples, and collected experimental data, Data plotting, writing of the manuscript, review, editing and formatting, and editing of manuscript corresponding to the journals.
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Sahu, M., Sahu, I.P. Studies on the structural, thermal and luminescence properties of Sr1−xZrSi2O7:xEu3+ phosphors for solid state lighting. Appl. Phys. A 130, 322 (2024). https://doi.org/10.1007/s00339-024-07458-y
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DOI: https://doi.org/10.1007/s00339-024-07458-y