Pyroxene-type phosphors were widely developed due to the advantages of high chemical stability, luminous efficiency, and low production cost. In this contribution, a series of Eu 2+ /Tb 3+ co-doped Ca 0.75 Sr 0.2 Mg 1.05 Si 2 O 6 (CSMS) phosphors with pyroxene structure were successfully synthesized by the solid-state method. Under the 340 nm excitation, the emission peaks of the phosphor show a redshift with the increase of Eu 2+ concentration. The emitting color of Eu 2+ /Tb 3+ co-doped samples shows a redshift attributed to the energy transfer from Eu 2+ to Tb 3+ . Simultaneously, acquired thermometer exposes superbly temperaturesensitive properties (S a and S r having maximum values 4.7% K −1 and 0.6% K −1 , respectively) over the cryogenic temperature range (77-280 K). Furthermore, it has good stability and precision at cryogenic temperatures, indicating that CSMS:0.03Eu 2+ /0.03Tb 3+ phosphor is a very promising fluorescent material suitable for cryogenic temperature sensing.
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