Dexerials Corporation

Kazuhiro Yagihashi

Tsuneo Kusunoki

Moriaki Abe

Takehiro Yamasuge

Yu Nomura

Masahide Daimon

Shinya Akiyama

Shuji Ohashi

A coated phosphor including: an inorganic phosphor particle; and a silicon oxide coating that coats the inorganic phosphor particle, wherein a molar ratio (O/Si) of an oxygen atom to a silicon atom in the silicon oxide coating through ICP emission spectroscopy of the coated phosphor is 2.60 or less.

Coated phosphor method for producing same, phosphor sheet, and light-emitting device

Coated phosphor, method for producing same, phosphor sheet, and light-emitting device

There is provided a semiconductor substrate including: a sapphire substrate; an intermediate layer formed of gallium nitride with random crystal directions and provided on the sapphire substrate; and at least one or more semiconductor layers each of which is formed of a gallium nitride single crystal and that are provided on the intermediate layer.

Semiconductor substrate, gallium nitride single crystal, and method for producing gallium nitride single crystal

Provided is a green phosphor having high conversion efficiency. The green phosphor is represented by the composition formula (SrCa)GaS:Eu(0.03&#x2264;x&#x2264;0.20 and 0&#x3c;y&#x2264;1). A full width at half maximum of a diffraction peak corresponding to a (422) plane in an XRD pattern is less than 0.18.

Green phosphor and production method therefor, phosphor sheet, and illumination device

A fluorescent substance, represented by the following general formula (1):Ca(SeS):Eu&#x2003;&#x2003;(1)where y is a value in the range of 0.5 to 1,wherein an absolute value of a difference between an optimal value (nm) of an emission peak wavelength corresponding to the value of y, and a measured value (nm) of the emission peak wavelength is 5 nm or less, and wherein an absolute value of a difference between an optimal value (nm) of a full width at half maximum of emission corresponding to the value of y, and a measured value (nm) of the full width at half maximum of emission is 6 nm or less.

Growing community of inventors

Tokyo, Japan

Kazuhiro Yagihashi