Toshiba Materials Co., Ltd.

Hayashi Telempu Corporation

Michiaki Fukui

Shuichi Saito

Daisuke Fukushi

According to one embodiment, provided is an electrochromic device including an electrochromic layer, which contains a tungsten oxide material. The tungsten oxide material includes potassium-containing tungsten oxide particles having an average particle size of 100 nm or less. The potassium-containing tungsten oxide particles contain potassium within a range of 1 mol % to 50 mol %, and include a central section and a peripheral section adjacent to the central section. A periodicity of a crystal varies between the central section and the peripheral section.

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Nagoya, Japan

Michiaki Fukui