Mitsubishi Chemical Corporation

Harumi Asami

Kentarou Horibe

Yukihiro Miyamoto

Soichiro Saita

Tadahiro Katsumoto

Ceco Dushkin

Shinya Maenosono

Minoru Soma

Yukio Yamaguchi

Provided is a sintered phosphor-composite for an LED, having high heat resistance, high thermal conductivity, high luminance, and high conversion efficacy. In addition, there are provided: a light-emitting apparatus which uses the sintered phosphor-composite; and an illumination apparatus and a vehicular headlamp which use the light-emitting apparatus. The sintered phosphor-composite includes a nitride phosphor and a fluoride inorganic binder. The sintered phosphor-composite preferably has an internal quantum efficiency of 60% or more when excited by blue light having a wavelength of 450 nm. Further, the sintered phosphor-composite preferably has a transmittance of 20% or more at a wavelength of 700 nm.

Sintered phosphor, light emitting device, illumination device, vehicle headlamp, and method for manufacturing sintered phosphor

An optical memory device comprising a luminous material capable of increasing and/or memorizing a photoluminescence intensity (hereinafter referred to as a &ldquo;luminous intensity&rdquo;) as a function of irradiation energy of excitation light. And the luminous material comprises nanoparticles, diameters of which are smaller than Bohr radius of the luminous material so that excitons generated in the nanoparticles undergo quantum containment state in which the electrons and holes are individually contained as a result of irradiation with excitation light.

Optical memory device

Growing community of inventors

Chiyoda-ku, Japan

Harumi Asami