Abstract
In this work, series of Sm3+ and Eu3+ single-doped CaSrSb2O7 phosphors were successfully synthesized via a high-temperature solid state method. The concentration quenching mechanism in both Sm3+ and Eu3+ activated phosphors was controlled by electric dipole-dipole interaction. The CaSrSb2O7: Sm3+ phosphors would emit color-tunable properties by adjusting doping concentration and temperatures. The optimal doping concentration of CaSrSb2O7: Sm3+ phosphors was determined to be 5 mol% while the corresponding Commission Internationale de I'Eclairage (CIE) chromatic coordinate would be (0.370, 0.423). In the meantime, the optimal doping concentration in CaSrSb2O7: Eu3+ phosphors was 20 mol%. CaSrSb2O7: 0.20Eu3+ phosphors have a CIE chromatic coordinate of (0.587,0.389) in orange red emission while the emission intensity at 423 K was still 50.69%, suggesting that the as-prepared CaSrSb2O7: Eu3+ phosphors with good thermal stability can be potential for solid-state lighting.
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