LAUSR

Summary There is a critical need for new earth-abundant phosphors to enable next-generation, highly efficient solid-state lighting. Here we report the discovery of Sr 2 LiAlO 4 , the first known Sr-Li-Al-O quaternary crystal, via a carefully targeted data-driven structure prediction and screening effort using density functional theory calculations. Sr 2 LiAlO 4 is predicted and experimentally confirmed to be a thermodynamically and thermally stable phosphor host that can be excited with near-UV/blue sources. The Eu 2+ - and Ce 3+ -activated Sr 2 LiAlO 4 phosphors exhibit broad emissions at λ max ∼ 512 nm (green-yellow) and λ max ∼ 434 nm (blue), respectively, with excellent thermal quenching resistance of >88% intensity at 150°C. A prototype phosphor-converted white LED utilizing Sr 2 LiAlO 4 -based phosphors yields an excellent color-rendering index exceeding 90. Sr 2 LiAlO 4 therefore exhibits great potential for industrial applications in low-cost, high-color-quality WLEDs.