Abstract: The novel Eu3+ doped BaTiO3 nanophosphors were synthesized by green combustion route using self-sacrificial Aloe Vera gel as a biofuel. The X-ray diffraction results showed the high purity with tetragonal crystal structure of BaTiO3. From diffuse reflectance spectra, the energy gap of the prepared samples was estimated to be ~3.29-3.35 eV. Scanning electron microscopy results indicate various types of nano/microstructures which are highly dependent on concentration of Aloe Vera gel. The Eu3+ doped BaTiO3 nanophosphor under UV light displays the characteristic red emission peaks corresponding to the 5D07FJtransitions of Eu3+ ions. Concentration quenching phenomenon was discussed based on energy transfer, electron–phonon coupling and ion–ion interaction. Judd–Ofelt intensity parameters were calculated by using the Photo luminescence emission spectra. The emission colour of the nanophosphors was tuned from pale red to pure red region by varying the concentration of Eu3+ in the BaTiO3 host. The prepared sample exhibit high color purity of ~ 92% and correlated color temperature was in the range ~ 2710-2115 K. The results indicate that the prepared phosphor was quite useful as warm and high purity red emission for solid state lighting applications.

Keywords: Nanophosphor, Photoluminescence, CIE, Solution combustion, Warm light

| DOI: 10.17148/IARJSET.2022.9285