Studies on organic-mediated synthesis of Y2O3:Eu3+ nanophosphors and its temperature-dependent photoluminescence properties

In this work, thermally stable Y2O3:Eu3+ nanophosphors were synthesized through the organic-mediated combustion technique using dilute citric acid/citric acid mixed with diethylene glycol as fuel. The structural analysis establishes that these oxides crystallize into the body-centred cubic structure with a space group la3. The nanophosphor prepared by citric acid with diethylene glycol as fuel exhibits better surface morphology and enhanced photoemission. The addition of polymeric precursors greatly enhanced the photoluminescence intensity of Y2O3:Eu phosphor by reducing the surface defects via morphological control and improvement of crystallite growth. Investigations on temperature-dependent photoluminescence studies reveal that the nanaophosphors are thermally stable, and the respective activation energies were 0.130 and 0.143 eV. The nanophosphor, fueled with diethylene glycol, exhibits remarkable CIE chromaticity coordinates (0.655, 0.345), in agreement with the National Television System Committee standards, and good CCT values with high colour purity (96.48%), making them potential red phosphor in the fabrication of white light-emitting diodes.