Thermally Stable Downconversion Luminescence and Upconversion Temperature Sensing Properties of Erbium-Doped Na2Y2TeB2O10 Phosphor

In this work, trivalent erbium ion-doped telluro-borate Na2Y2TeB2O10 (NYTB) phosphor was prepared by a solid-state synthesis. The structure and morphology were comprehensively characterized. The downconversion/ upconversion green luminescence of the phosphor was deeply studied. The thermally stable downconversion luminescence at 423 K only loses 10.4% of the intensity at room temperature. The upconversion luminescence has satisfactory temperature sensing properties with the maximum SR parameter of 0.82% K-1. The current research illustrates a new erbium-doped telluro-borate material for lighting and temperature detecting applications.