Patent ID: 7683363

Claim:
A composition for photon energy up-conversion comprising: a first component capable of absorbing energy at a first wavelength region w≦λ 1 ≦x, the first component acts as a sensitizer in said composition; and a second component capable of emitting energy at a second wavelength region y≦λ 2 ≦z, the second component acts as an emissive component in said composition, wherein λ 2 ≦λ 1 , upon absorption of energy by said first component at said first wavelength region λ 1 , said emissive component emits energy at said second wavelength region λ 2 , said first component is a first organic dye, said second component is a second organic dye, said first and second organic dyes are the same or different dyes, and at least one of said first and second organic dye comprises at least one of styryl dyes, benzothiazole-containing two-photon chromophores, polyfluorenes, polyparaphenylenes, porphyrins, phthalocyanins, phthalocyanin complexes, xanthenes, and rhodamines.