Panasonic Intellectual Property Management Co., Ltd.

Youshin Lee

Masahiro Nakamura

Kensuke Nakura

Takeshi Abe

Shozo Oshio

Ryuichi Natsui

Tatsuya Okuno

Mitsuhiro Hibino

A positive-electrode active material for a magnesium secondary battery contains a composite oxide represented by the following composition formula:M1M2O,where M1 is sodium, M2 is nickel and manganese, and 0<x+y≤2.

Positive-electrode active material and battery

A wavelength conversion member includes: a substrate; a wavelength converter including phosphor particles excited by excitation light and a binder layer that fixes or adheres the adjacent phosphor particles to one another, the wavelength converter being provided on a front surface side of the substrate; and a light reflecting film that reflects fluorescent light radiated by the phosphor particles, the light reflecting film being provided on at least a part of an interface between the substrate and the wavelength converter, wherein a refractive index of the phosphor particles is larger than a refractive index of the binder layer. It is preferable that the binder layer include nanogaps which are voids with an average diameter of 300 nm or less in an inside.

Wavelength conversion member

A wavelength conversion member includes: a substrate; and a wavelength converter that converts color of incident light, the wavelength converter being provided on a surface of the substrate. The wavelength converter has: inorganic phosphor particles which convert the color of the incident light; and a binder layer that fixes the inorganic phosphor particle to one another, the binder layer including at least one type of metal oxides with a melting point of 800&#xb0; C. or less. The substrate and the wavelength converter are fixed to each other by the binder layer of the wavelength converter.

A light emitting deviceincludes: a substrate; and a phosphor layercomposed in such a manner that a large number of phosphor particlesare adhered onto a flat surfaceof the substrate. At least one of the phosphor particlesis a polyhedral phosphor particlethat is monodispersed, is derived from a crystal structure of garnet and has facets, and a median particle size Dof the polyhedral phosphor particleis 30 &#x3bc;m or more and a maximum thickness of the phosphor layeror less. It is preferable that at least one of the phosphor particlesadhered onto the flat surfaceof the substrateis the polyhedral phosphor particlethat is monodispersed, is derived from the crystal structure of the garnet, and has the facets.

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Osaka, Japan

Youshin Lee