Abstract
In this study, we are successfully synthesized terbium and samarium (Tb3+/Sm3+) doped K3Ca2(SO4)3Cl phosphors by wet chemical method, and synthesized phosphors were characterized by XRD, SEM, and Photoluminescence (PL) techniques, and studied in detail. Photoluminescence analysis, we can see that under the Near-UV (NUV) excitation of 380nm, the Tb3+ activated samples showed a prominent green emission peak at 546nm attributed to the 5D4→7F5 transition of Tb3+ions. While the PL emission spectra of 404 nm light excited K3Ca2(SO4)3Cl:Sm3+phosphorshowedthree emission lines at 565nm, 598nm and 645nm attributed to 4G5/2→6H5/2, 4G5/2→6H7/2, and4G5/2→6H9/2 transitions of Sm3+ ions, respectively. The CIE coordinates were calculated to be (0.263, 0.515) for K3Ca2(SO4)3Cl:Tb3+and (0.532, 0.462) for K3Ca2(SO4)3Cl: 1.5mol%Sm3+, which liedin the green and orange regions, respectively. The entire photoluminescence results indicated that phosphor K3Ca2(SO4)3Cl doped with Tb3+ and Sm 3+may turn out to be an important component of pc-white LEDs and display devices.
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