ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 43, Number 2
JKCSEZ 43(2)
April 20, 1999 

The main objective of the present investigation is to improve the photoluminescent performance of existing Zn2SiO4 : Mn phosphors by introducing a new co-dopant. The co-doping effect of Mg and/or Cr upon emission intensity and decay time was studied in the present investigation. The co-dopants incorporated into the Zn2SiO4 : Mn phosphors are believed to alter the internal energy state so that the change in emission intensity and decay time can be expected. Both Mg and Cr ions have a favourable influence on photoluminescence prperties, for example, the Mg ion engances the intensity of manganese green emission and the Cr ion shortens the decay time. The engancement in emission intensity of Zn2SiO4 : Mn, Mg phosphors was interpreted by taking into account the result from the DV-Xαembedded cluster calculation. On the sther hand, the energy transfer between Mn and Cr ions was found to be responsible for the shortening of decay time in Zn2SiO4 : Mn, Cr phosphors.