Shashank Sharma, and Sanjay Kumar Dubey
The effect of concentration of Eu2+-doped and Dy3+-codoped on the photoluminescence properties of Ca2MgSi2O7 is discussed. Through the implementation of a high-temperature solid-state reaction process, the powder samples were formed. The structural, optical characterisation, and chemical composition of produced powder samples have been determined using X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and CIE colour coordinates analysis. Phase Identification was done by X-ray diffraction analysis and its results revealed tetragonal, akermanite structure with a space group P¯421 m. This structure is a member of melilite group. Nowadays, a significant amount of attention has been placed on researching the chemicals belonging to the melilite group. The estimated crystallite size (D) is ~42 nm. Photoluminescence (PL) emission and photoluminescence excitation (PLE) spectra were used to analyse optical characteristics. At wavelengths of 525 nm, the synthesized phosphor exhibits a greater PL emission intensity under UV excitation at 396 nm, which suits the visual perception of the human eye very well. The Ca2MgSi2O7:Eu2+, Dy3+ phosphor exhibits improvement in PL intensity and quenching occurs at 2 mol % doping concentration of Dy3+ ions and 0.5 mol % fixed doping concentration of Eu2+ ions. The synthesized phosphors may be potentially beneficial for solid-state lighting devices, depending on the specific the PL results. The synthesised phosphor's XRD, FTIR, PL, and CIE Chromaticity coordinates are also presented in this research investigation.
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