Synthesis and characterization of SrBAlO4:Eu3+ phosphor toward the healthy lighting for w-LEDs application

A series of orange–red-emitting Eu3+-doped Sr1-xBAlO4 (0 ≤ x ≤ 0.13) phosphors via the solid-state synthesis and the luminescent and thermal properties are comprehensively investigated. Through the experiment, it is discovered that the optimal concentration of Eu3+ in Sr1-xBAlO4:xEu3+ phosphors belong to x = 0.09 and can be excited by near-ultraviolet wavelength of 394 nm (7F0–5L6). The Sr0.91BAlO4:0.09Eu3+ phosphors possess a good thermal stability, of which the emission intensity at 150 °C can maintain 75.89% of the initial value (25 °C). The circadian action and color rendering of near-ultraviolet white light-emitting diodes (LEDs) are studied, and the optimum circadian action factor (CAF) decreases 11.9% compared to that of the standard light source under a correlated color temperature (CCT) of 7018 K. Finally, it is recommended that the SrBAlO4:Eu3+ phosphors applied in near-ultraviolet white light-emitting diodes show great potentials for their applications in the healthy lighting.