Phosphor and light-emitting device using same

摘要

Provided is a phosphor having enhanced luminance with respect to that of conventional β-type sialon phosphors. A phosphor having enhanced luminance is obtained by causing Al, O (oxygen) and Eu to be present at specific concentrations in a produced β-type sialon phosphor. Specifically, provided is a β-type sialon phosphor containing Si, Al, O, N and Eu, wherein the Al concentration in the phosphor ranges from 0.80 mass % or higher to 2.25 mass % or lower, the O concentration ranges from 0.36 mass % or higher to 1.15 mass % or lower, the Eu concentration ranges from 0.40 mass % or higher to 0.80 mass % or lower and a ratio (Al/O) of the Al concentration with respect to the O concentration ranges from 2.0 or higher to 3.0 or lower.

主权项

1. A β-type sialon phosphor, comprising Si, Al, O, N, and Eu, wherein
an Al concentration in the phosphor ranges from 0.90 mass % or higher to 2.25 mass % or lower, an O concentration ranges from 0.36 mass % or higher to 1.15 mass % or lower, an Eu concentration ranges from 0.40 mass % or higher to 0.80 mass % or lower, and a ratio (Al/O) of the Al concentration with respect to the O concentration ranges from 2.0 or higher to 3.0 or lower.