[en] For the first time green route method was used to synthesize pure and Mg²⁺(1-11 mol %) doped Y₂O₃ nanophosphors by using Mimosa pudica leaves extract as a fuel. The final product was well characterized by powder x-ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS) and photoluminescence (PL).The PXRD result shows the formation of single phase, cubic structure of Y₂O₃ with crystallite sizes ∼25 nm. The SEM results showed porous and agglomerated structures, TEM images showed the crystallite size of the material and was found to be around ∼ 25 nm. PL emission spectra show the blue light emission under the excitation wavelength of 315 nm. The emission peaks of Mg²⁺were observed at 428 nm, 515 nm and 600 nm corresponding to the transitions of ⁴F_9/2 → ⁶Hi_7/2 (violet), ⁴F_9/2 → ⁶Hi_5/2 (blue), ⁴F_9/2 → ⁶HJ_3/2 (yellow) respectively. The estimated CIE chromaticity co-ordinate was very close to the national television standard committee value of blue emission. CCT was found to be ∼ 6891 K as a result the present phosphor was potential to be used for warm white light emitting display applications. (paper)