SYNTHESIS AND LUMINESCENCE STUDIES OF Ca(PO3)2 :Eu3+MATERIAL FOR SSL APPLICATIONS

The phosphors in the system Ca_1-x (PO₃)₂: xEu³⁺ was synthesized by solid-state reactions and their photoluminescence properties were investigated. The synthesized host powder of Ca (PO₃)₂ was confirmed on Rigaku miniflex X-ray diffractometer (XRD) with scan speed of 2 deg/min with Cu Kα radiation. The photoluminescence spectra were recorded with the help of Hitachi FL-7000 photo spectrometer. The morphology of this phosphor was checked in the form of Scanning Electron Microscope (SEM) characteristics were carried out for this prepared phosphor. These phosphors have well absorption in the near UV region at 395 nm due to 7F₀-­­-5L₆ transition of Eu³⁺, which is suitable for excitation of ultraviolet light emitting diodes (UV-LEDs). The orange-reddish emission of Eu³⁺ at 614 nm due to 5D₀—7F₂ transition of Eu³⁺, in these phosphors can be used as a red component in the tri-color system. The emission spectra exhibit orange-reddish performance (CIE chromaticity coordinates: X = 0.6775, Y = 0.3223), which is due to the 5D₀à7F₂transitions of Eu³⁺ ions.The results interpretation clears that Ca (PO₃)₂: Eu³⁺ phosphors could be used in white light UV-LEDs.