As the temperature rises, it is evident that the emission intensity of other emission peaks exhibits an increasing trend in comparison to the 620 nm peak, so that the integral intensity shows a non-thermal quenching phenomenon.
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Preparation and Luminescence Property Study of Red-Emitting Na<sub>3.6</sub>Y<sub>1.8</sub>(PO<sub>4</sub>)<sub>3</sub>:Eu<sup>3+</sup>,Li<sup>+</sup>/K<sup>+</sup> Phosphors with Excellent Thermal Stability for Light-Conversion Application.
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