No abstract

A series of color-tunable Ca SiO Cl (CSC):xCe ,xLi ,yMn ,zEu phosphors with low temperature phase structure was synthesized via the sol-gel method. An energy transfer process from Ce to Mn in CSC:0.01Ce ,0.01Li ,yMn (y = 0.03-0.09) and the mechanism was verified to be an electric dipole-dipole interaction. The Ce and Mn emission intensities were greatly enhanced by co-doping Eu ions into CSC:0.01Ce ,0.01Li ,0.07Mn phosphors due to competitive energy transfers from Eu /Ce to Mn , and Ce to Eu . Under 332 nm excitation, CSC:0.01Ce ,0.01Li+,0.07Mn ,zEu (z = 0.0005-0.002) exhibited tunable emission colors from green to white with coexisting orange, green and violet-blue emissions. These phosphors could have potential application in white light-emitting diodes.

No abstract