Luminescence properties of novel Eu ³⁺ ‐doped tantalate NaCaTiTaO ₆ red‐emitting phosphors for solid‐state lighting

Abstract

Abstract A novel tantalate red‐emitting phosphors NaCa 1‐x Eu x TiTaO 6 ( x = 0.02‐0.50) is synthesized via the traditional solid‐state reaction sintering. The photoluminescence properties, X‐ray diffraction (XRD), scanning electron microscopy (SEM), and thermal stability are characterized in detail. Photoluminescence spectra show strong red emission monitored at 614 nm at λ ex = 395 nm. The spectral properties exhibit excellent color purity and chromaticity coordinate (CIE) characteristics. White light‐emitting diodes (w‐LEDs) device are fabricated by the prepared phosphors and show high quality of color‐rendering index. The investigated results suggest that the Eu 3+ ‐doped NaCaTiTaO 6 phosphors can be as potential substitute red phosphors for w‐LEDs.