International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Synthesis, characterization, and optical properties of Li2SrSiO4Eu3+phosphors

Author(s) Mr. Rameshwar Prasad Upadhyay, R.S.Kher, Rashmi Sharma
Country India
Abstract The undoped and Eu3+doped Li2SrSiO4 materials of various concentrations (0.5, 1, 2, 3, and 4% mol) were synthesized via the traditional high-temperature solid-state reaction method. The phase structure and morphology of the as-prepared samples were characterized by XRD and FESEM with EDX (energy-dispersive spectroscopy). The crystalline size was 65 nm, calculated by the sheerer formula. The PL properties of Li2SrSiO4: Eu3+ have been studied using by spectrofluorometer. The PL excitation and emission spectra were obtained at 200- 450 nm and 500 -700 nm, respectively, and were found in the UV region (250-350 nm) due to CBT of O2-→Eu3+. Some narrow peaks are identified within the 330- 410 nm range, particularly at 395 nm due to intra-4f transitions of Eu3+ (7F0 → 5L6). In emission spectra, two main peaks are observed: the first is a strong peak centered at 593 nm, corresponding to 5D0→7F1, while the second peak found between 615 nm and 620 nm is attributed to the transition 5D0→7F2. It was investigated that 1 mol% % of Eu3+ is the optimum concentration. The TL properties have also been investigated for different concentrations of Eu3+ with 15 minutes of UV exposure.. It has been observed that in the TL glow curve, two peaks are observed at 174 0C and 272 °C for all concentrations of Eu3+. We have calculated the trap depth (E), frequency factor(s), for both peaks for x Eu3+(x 0.5,1,2,3,4 mol%). The PL properties of these phosphors result in it being considered to be an orange-red emitting phosphor for white light emitting diode applications, while the TL properties showed that europium-doped lithium strontium silicate has the potential to be considered as the TLD.
Keywords Solid-state reaction method, EDX, Spectrofluorometer, TLD
Field Physical Science
Published In Volume 7, Issue 5, September-October 2025
Published On 2025-10-18
DOI https://doi.org/10.36948/ijfmr.2025.v07i05.58278
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E-ISSN 2582-2160
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