TUNABLE COLOR EMISSION IN A BA1-XSRXY2S4-EU2+ PHOSPHOR

X-ray diffraction (XRD) and Photoluminescence (PL) measurements were p erformed in order to investigate the tunable color emission in a Ba1-x SrxY2S4 : Eu2+ phosphor. The results of the XRD measurements showed th at the Ba1-xSrxY2S4 : Eu2+ is crystallized with the orthorhombic struc ture, and those of the PL measurements showed that the PL peak observe d in Ba1-xSrxY2S4 : Eu2+ had a red-shift behavior as a Sr concentratio n increased. These results indicate that the tuning range of the emiss ion color is approximately between 600 and 640 nn in the Ba1-xSrxY2S4 : Eu2+ phosphor by changing the Sr composition. Copyright (C) 1996 Pub lished by Elsevier Science Ltd