Preparation and luminescence properties of Ba9Y2Si6O24: Sm3+ phosphors with excellent thermal stability for solid-state lightning
Tóm tắt
A novel orange-red luminescent single-phase Sm3+ activated Ba9Y2Si6O24 phosphor was prepared via a conventional solid-state reaction approach. The crystal structure and luminescence characteristics of the synthesized phosphor were investigated in detail by using X-ray diffraction (XRD), photoluminescence excitation (PLE) spectra, photoluminescence (PL) spectra and temperature-dependent spectra. The Ba9Y2Si6O24: Sm3+ phosphor shows a series of sharp peaks ranging from 500 to 700 nm under the excitation of 404 nm, and the strongest peak was at 603 nm. Considering the concentration quenching mechanism, the optimal Sm3+ doped concentration is determined to be 0.06. Further research on the thermal quenching performance of Ba9Y2Si6O24: 0.06Sm3+ phosphors, indicating that Ba9Y2Si6O24: 0.06Sm3+ phosphors present excellent thermal stability, even the temperature goes up to 423 K, the emission intensity is 62.7% of that at 298 K. The above results demonstrate that Ba9Y2Si6O24: Sm3+ phosphor has ideal luminous performance and excellent thermal stability. As an orange-red luminescent material, Ba9Y2Si6O24:Sm3+ phosphor has broad development prospects in the application of white light- emitting diodes.
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