International Journal of Science, Engineering and TechnologyAuthors: Venkataravanappa M, Venkatachalaiah. K. N
Abstract: Y2O3:Tm3+ (5mol %) nanoscale superstructure was prepared using Mimosa pudica plant extract as a fuel and nitrate source as a precursors.The sample was characterized by advanced characterization techniques. The PXRD data shows the formation of single phase, cubic structure of Y2O3 with crystallite sizes ~35 nm. PL emission spectra show the blue light emission under the excitation wavelength of 358 nm. The major emission peak of Tm3+ was at 453 nm and two very weak peaks were observed at ~ 474 nm, corresponding to the transitions of 1D2 → 3 F4 and 1G4 → 3H6, respectively. The estimated CIE chromaticity co-ordinate was very close to the national television standard committee value of blue emission. Correlated color temperature was found to be ~ 4000 K as a result the present phosphor was potential to be used for warm white light emitting display applications.
DOI: http://doi.org/10.5281/zenodo.17750245
