Rare Earth Ion (Dy3+) Photoluminescence Behaviour in Sr2CeO4 Phosphor


Authors : Ch. Atchyutha Rao, K.V.R. Murthy

Volume/Issue : Volume 5 - 2020, Issue 3 - March

Google Scholar : https://goo.gl/DF9R4u

Scribd : https://bit.ly/3bZmPx0

Solid state reaction method was used to prepare rare earth’s powder samples of strontium cerium oxide (Sr2CeO4) that are doped with(Dy3+) ion. Laser diffraction particle size analysis, Fourier Transform Infrared spectrometer (FTIR) technique, photoluminescence (PL) technique, scanning electron microscope (SEM), and X-ray diffraction (XRD) techniques were used to characterize these samples that are fired at 12000C for 3h. Also, it has been disclosed by the XRD patterns that an orthorhombic crystal structure is exhibited by the Sr2CeO4:Dy3+phosphor. According to the room temperature photoluminescence (PL) analysis there exists three excitation peaks that are situated at 250, 260 and 270nm as well as an intense blue emission is showed by samples at 470nm and yellow emission at 575nm. Also, it has been shown by the SEM images that samples fired at 12000C were highly agglomerated with multi layered structure. Sample’s mean diameter is indicated by particle size distribution histogram and molecule’s chemical bonds are determined by FTIR. It was also revealed by Sr2CeO4:Dy3+CIE (Commission international de l’eclairage) that there is a variation in emission from blue to yellow and finally to orange when dysprosium concentration is increased.

Keywords : Particle size distribution histogram; Yellow emission; Blue emission; Solid state reaction method; Sr2CeO4

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