Novel reddish yellow-emitting Ba-3(Sc1-xCex)(4)O-9 (0 <= x <= 0.01) phosphors were synthesized in a single-phase form by a conventional solid-state reaction method. These phosphors exhibited excellent optical absorption in the blue-light region and showed reddish yellow emission with a peak at 583 urn due to the 5d -> 4f transition of Ce3+ under excitation at 437 nm. By optimizing the Ce3+ concentration, the maximum emission intensity was obtained for Ba-3(Sc0.999Ce0.001)(4)O-9.