J. Alloys Compd., 2019, 805, 1246-1253. https://www.sciencedirect.com/science/article/abs/pii/S092583881932715X

Stable and high-efficiency narrow-band green phosphor is a key component for wide color gamut liquid crystal display (LCD) backlights. In this paper, narrow-band green-emitting Sr_3-3xSi₁₃Al₃O₂N₂₁:3xEu²⁺ (0.001 ≤ x ≤ 0.09) (Sr-Sialon:Eu²⁺) phosphor with a full-width at half maximum of 66 nm has been successfully synthesized by using the solid-state reaction method. All the samples are the pure phase with Sr₃Si₁₃Al₃O₂N₂₁-type structure. Their emission band maximum can be tuned from 495 to 523 nm by increasing Eu²⁺ content. The compound with x = 0.03 possesses the highest luminescence intensity with the peak position around 510 nm. Luminescent thermal stability gets better with Eu²⁺ concentration decreasing. The integrated intensity of the sample with x = 0.01 at 425 K remains about 80% of the intensity at room temperature. The host referred binding energy (HRBE) and vacuum referred binding energy (VRBE) schemes are constructed to further explain its luminescent thermal quenching mechanism. White light-emitting-diode (w-LED) device using optimized Sr_2.91Si₁₃Al₃O₂N₂₁:0.09Eu²⁺ phosphor demonstrates its potential application for LCD backlights.