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In this work, Ce3+ and Sm3+ ions doped/co-doped Ca2Al2SiO7 (CAS) phosphors were prepared by solid state reaction method at high temperature. X-ray diffraction results showed that the prepared samples had tetragonal single phases with selected synthesis conditions. Energy transfer process of Ce3+/Sm3+ pair in CAS phosphor was studied by photoluminescence (PL) and photoluminescence excitation (PLE) spectra. Emission intensity of Ce3+ in Ca2Al2SiO7:xCe3+ , (1mol%) Sm3+ phosphors clearly varied with Ce3+ concentration; and reached to maximum value at the concentration of 2 (mol%). Additionally, concentration quenching phenomenon was observed in Ca2Al2SiO7: xCe3+ , (1mol%) Sm3+ samples, which was arisen from dipole-dipole interaction. |
