High-Brightness Red-Emitting Phosphor La(Si,Al)(O,N):Ce for Next-Generation Solid-State Light Sources.

A novel high-brightness red-emitting phosphor, La(Si,Al)(O,N):Ce (LSA), which can potentially be used as a laser-excited light source, is demonstrated. Laser-excited phosphor system has great potential for use as a white-light source, as it is orders of magnitude brighter than white LEDs. Although conventional yellow-green phosphors show excellent luminescent properties even under high-power laser excitation, red-emitting phosphors, which are essential to achieve a high color-rendering index and low color-temperature, show quantum efficiency quenching.