Mn ⁴⁺ ,Li ⁺ co-doped SrMgAl ₁₀ O ₁₇ phosphor-in-glass: application in high-power warm w-LEDs

yellow phosphor co-doped inorganic PiG were successfully fabricated as color converters to substitute organic silicone. The w-LED was fabricated by combining an InGaN blue LED chip with a PiG plate. Importantly, the constructed w-LEDs exhibited superior optical performance and tuned chromaticity feature with the correlated color temperature evolved from bluish cool white (6903 K) to yellowish warm white (3717 K), and the color rendering index increased from 69.4 to 85.5, meeting the requirements for indoor lighting.