Color‐Tunable Eu ³⁺ , Eu ²⁺ ‐Activated CaSiO ₃ Nano Phosphor Extract from Agricultural‐Recycling‐Food‐Waste Materials for Display Applications

A series of Eu3+ and Eu2+ doped wollastonite is produced with a modified sol–gel technique using agricultural-food waste materials. Rice husk ash (RHA) eggshell (ES) are used as an usher for silica calcium oxide, appropriately, at different concentrations (0.0, 0.2, 0.4, 0.6, 0.8, 1 mol%). Most investigations have documented photoluminescence (PL) from ions caused by electronic transitions between 4f levels (5D0 → 7FJ) but there limited information on emissions ions. Fourier transform infrared (FTIR) spectra X-ray diffraction (XRD) studies reveal that varying amounts europium do not any effect the structure host. PL display exist in both trivalent divalent forms. valence change to ion investigated luminescence measurements. As-prepared activated β-wollastonite emitted red reduction atmosphere argon gas phosphor gives off blue light. X-Ray photoelectron spectroscopy reveals throughout processing samples, cations partially reduced atmosphere. These findings prove feasibility fabricating white light-emitting diodes (white-LEDs) three-band type (RGB) phosphors utilizing only one host crystal.