Production of bright, wideband white light from Y2O3 nano-powders induced by laser diode emission

• Nominally un-doped Y2O3 nanopowders were synthesized by using thermal decomposition method.
• We report the production of white light from nominally un-doped Y2O3 nano-powders under laser diode excitation.
• Some spectroscopic parameters of obtained white light emission were determined under a variety of conditions.
• It was determined that the efficiency of our white light production is greater than that of a commercial incandesdent lamp.

We report the production of efficient, wideband white light with a spectrum ranging from 400 to 900 nm obtained by using nominally un-doped Y2O3 nanopowders when excited with the 803.5 nm emission of a laser diode. The powders synthesized by using thermal decomposition technique were estimated to be 20 nm in size by using XRD patterns and confirmed of this size by using SEM images. The color temperature of the obtained white light was determined as 2756 K with a high color rendering index of 99.