The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2019
Filed:
Jan. 29, 2015
Nippon Kayaku Kabushikikaisha, Chiyoda-ku, Tokyo, JP;
Tokyo Institute of Technology, Meguro-ku, Tokyo, JP;
Yoichi Murakami, Tokyo, JP;
Toshiyuki Ito, Tokyo, JP;
Ryoutarou Morita, Tokyo, JP;
Kazuki Niimi, Tokyo, JP;
Noriko Kiyoganagi, Tokyo, JP;
Nippon Kayaku KabushikiKaisha, Tokyo, JP;
Tokyo Institute Of Technology, Tokyo, JP;
Abstract
There is provided an optical wavelength conversion element with a good temporal stability and such a high optical wavelength conversion efficiency that the element is viable even under sunlight or similar, low intensity light. Owing to these properties, the element is suited for use in solar cells, photocatalysts, photocatalytic hydrogen and oxygen generating devices, photon upconversion filters, and like articles. The optical wavelength conversion element is visually homogeneous and transparent and produced by dissolving and/or dispersing in an ionic liquid (C) a combination of organic photosensitizing molecules (A) and organic light-emitting molecules (B) that exhibits triplet-triplet annihilation. The organic photosensitizing molecules (A) have either an only one local maximum absorption wavelength or a plurality of local maximum absorption wavelengths, and either the single local maximum absorption wavelength or a maximum one of the plurality of local maximum absorption wavelengths is from 250 nm to 499 nm.