Photoluminescence properties of wet-chemically synthesized Tb3+ and Sm3+doped K3Ca2(SO4)3Cl phosphor

In this study, we are successfully synthesized terbium and samarium (Tb 3+ /Sm 3+ ) doped K 3 Ca 2 (SO 4 ) 3 Cl 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 Tb 3+ activated samples showed a prominent green emission peak at 546nm attributed to the 5 D 4 → 7 F 5 transition of Tb 3+ ions. While the PL emission spectra of 404 nm light excited K 3 Ca 2 (SO 4 ) 3 Cl:Sm 3+ phosphorshowedthree emission lines at 565nm, 598nm and 645nm attributed to 4 G 5/2 → 6 H 5/2, 4 G 5/2 → 6 H 7/2, and 4 G 5/2 → 6 H 9/2 transitions of Sm 3+ ions, respectively. The CIE coordinates were calculated to be (0.263, 0.515) for K 3 Ca 2 (SO 4 ) 3 Cl:Tb 3+ and (0.532, 0.462) for K 3 Ca 2 (SO 4 ) 3 Cl: 1.5mol%Sm 3+ , which liedin the green and orange regions, respectively. The entire photoluminescence results indicated that phosphor K 3 Ca 2 (SO 4 ) 3 Cl doped with Tb 3+ and Sm 3+ may turn out to be an important component of pc-white LEDs and display devices.