Luminescent properties and reduced dimensional behavior of hydrothermally prepared Y2SiO5:Ce nanophosphors Academic Article uri icon

abstract

  • Hydrothermally prepared nanophosphor Y2SiO5:Ce crystallizes in the P21c structure, rather than the B2b structure observed in bulk material. Relative to bulk powder, nanophosphors of particle size 25100nm diameter exhibit redshifts of the photoluminescence excitation and emission spectra, reduced self absorption, enhanced light output, and medium-dependent radiative lifetime. Photoluminescence data are consistent with reduced symmetry of the P21c structure and are not necessarily related to reduced dimensionality of the nanophosphor. In contrast, medium-dependent lifetime and enhanced light output are attributed to nanoscale behavior. Perturbation of the Ce ion electric field is responsible for the variable lifetime.

published proceedings

  • Applied Physics Letters

author list (cited authors)

  • Cooke, D. W., Lee, J., Bennett, B. L., Groves, J. R., Jacobsohn, L. G., McKigney, E. A., ... Hong, K. S.

citation count

  • 86

publication date

  • March 2006