Synthesis and luminescence properties of Sr3Y(BO3)3:Eu3 +: A potential ultraviolet excitation full spectrum component red phosphor

Driven by the escalating demand for efficient and stable full-spectrum red-emitting phosphors, a series of Eu-doped Sr 3 Y(BO 3 ) 3 red phosphors were synthesized via high-temperature solid-state reaction method. The crystal structure, morphology, and photoluminescence properties were systematically characterized. Under near-ultraviolet (near-UV) excitation, the Sr 3 Y(BO 3 ) 3 :Eu 3+ phosphor exhibits intense red emission corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ , with high color purity. Particularly noteworthy is its combination of excellent thermal stability and humidity resistance—it retains 75% of its room-temperature luminescence intensity at 473 K, and maintains as high as 86.2% of its luminescence intensity under high-humidity conditions. To evaluate its practical applicability, white light-emitting diodes (WLEDs) were fabricated by incorporating commercial BMA:Eu 2+ blue phosphor, BSS:Eu 2+ green phosphor and Sr 3 Y(BO 3 ) 3 :0.36Eu 3+ phosphor into near-UV chips. Driven at 150 mA, the fabricated device emits white light with CIE coordinates of (0.3186, 0.3130), lying close to Planckian locus, correlated color temperature (CCT) of 6284 K and a well-balanced RGB spectrum. Notably, a high CRI value (R a = 81.5) is achieved by the device with an especially impressive R 9 (special color rendering index for deep red) value of 93.3, indicating excellent red rendering performance. Collectively, these results identify Sr 3 Y(BO 3 ) 3 :Eu 3+ as a highly competitive red-emitting phosphor for near-UV-excited full spectrum white LEDs, owing to its superior thermal stability, humidity resistance, and device performance.