Light wavelength conversion medium and composition for forming light wavelength conversion medium
AssigneesKabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
InventorsHiroki Iwanaga, Kenji Miyazaki, Junichi Washizuka
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Abstract
The present embodiments provide a light wavelength conversion medium excellent in emission intensity and durability, and also a light wavelength conversion medium-forming composition used for forming that medium. The conversion medium according to the embodiment comprises a rare earth complex comprising a rare earth ion and a nonionic ligand, a nonionic compound substitutable for the nonionic ligand, and a polymer or a solvent.
Claims20
A light wavelength conversion medium comprising:
- a rare earth complex comprising a rare earth ion and a nonionic ligand,
- a nonionic compound substitutable for said nonionic ligand, and
- a polymer or a solvent,
- wherein:
- the total molar amount of said nonionic compound and said nonionic ligand is larger than the stoichiometric molar amount required to achieve maximum coordination of the rare earth ion contained in said light wavelength conversion medium;
- and
- said nonionic ligand and said nonionic compound are selected from the group consisting of phosphine oxide compounds, sulfoxide compounds, and amine compounds.
A light wavelength conversion medium-forming composition comprising:
- a rare earth complex comprising a rare earth ion and a nonionic ligand,
- a nonionic compound substitutable for said nonionic ligand, and
- a polymer or a solvent,
- wherein:
- the total molar amount of said nonionic compound and said nonionic ligand is larger than the stoichiometric molar amount required to achieve maximum coordination of the rare earth ion contained in said light wavelength conversion medium;
- and
- said nonionic ligand and said nonionic compound are selected from the group consisting of phosphine oxide compounds, sulfoxide compounds, and amine compounds.
Dependencies are inferred from the claim text.