Structural modulation designed a thermally robust blue-cyan emitting phosphor YMgSr AlSiO:Eu for the high color rendering index white LEDs.

In this work, the novel, to the best of our knowledge, blue-cyan : (:) phosphors were synthesized by the solid-state method. At 150°C, the emission intensity of :0.005 can retain 96.38% of the relative intensity, which means that this phosphor shows high thermal stability. A white light-emitting diode (LED) device is fabricated by combining a 370 nm near ultraviolet LED chip and commercial phosphors (green, (,):; red, :). The white LED has an excellent property with the correlated color temperature =5236 and superhigh color rendering index =96.1, which indicates the potential application in white LED fields.