| 摘要 |
A phosphor (A) comprising a host material composed of a compound having a garnet crystal structure represented by the general formula (I): <?in-line-formulae description="In-line Formulae" end="lead"?>M<SUP>1</SUP><SUB>a</SUB>M<SUP>2</SUP><SUB>b</SUB>M<SUP>3</SUP><SUB>c</SUB>O<SUB>d</SUB> (I)<?in-line-formulae description="In-line Formulae" end="tail"?> (wherein M<SUP>1 </SUP>is a divalent metal element, M<SUP>2 </SUP>is a trivalent metal element, M<SUP>3 </SUP>is a tetravalent metal element containing at least Si, a is the number of 2.7 to 3.3, b is the number of 1.8 to 2.2, c is the number of 2.7 to 3.3, and d is the number of 11.0 to 13.0), and a luminescent center ion incorporated in the host material; a light emitting device (B) comprising the phosphor as a wavelength conversion material and a semiconductor light emitting element capable of emitting a light in the range of from ultraviolet light to visible light; and a display (C) and a lighting system (D) using the light emitting device (B) as a light source. The above phosphor can be readily produced, and can provide a light emitting device having a high color rendering property.
|
