فهرست نشریات علمی دسترسی آزاد ایران

Undoped and Sm3+ ions doped Magnesium Cadmium Pyrophosphate (MCP) nanopowders were prepared by a well-established Solid-State Reaction (SSR) Method. Structural, morphological, vibrational and luminescent properties were investigated by viz. Powder X-ray diffraction, Field emission scanning electron microscopy with Energy dispersive Spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, Diffuse reflectance spectroscopy and Photoluminescence studies. The samples were found to be in the monoclinic phase with P21/n space group in the nanoscale range, according to the XRD. For undoped and Sm3+ doped MCP nanopowder, the average crystallite size is around 77 and 62 nm respectively. The surface morphology shows a grouped pattern resembling stone-like structure. When the samples were examined using FTIR, the pyrophosphate group vibrational modes were determined and the same bands were also confirmed by Raman studies. Based on the DRS, the optical bandgap values are 3.05 eV, 3.01 eV, 2.98 eV and 2.76 eV for the undoped, Sm3+ doped MCP samples respectively. The prepared samples show emission at 599 nm upon excitation at 401 nm, according to the PL spectrum. The concentration quenching, average lifetime, colour-correlated temperature, color purity and color rendering index were determined. These samples can be used in solid state optical lighting devices.