Device for modifying the wavelength range of a spectrum of light
First Claim
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1. A device for modifying, e.g. narrowing the wavelength range of a spectrum of light incident on said device, such that light emitted from said device has a modified, e.g. more narrow wavelength range in comparison to said incident light, said device comprisinga medium for photon energy up-conversion comprising at least two components and a matrix in which said at least two components are distributed, wherein a first component is capable of absorbing light at a first wavelength region w≦
- λ
1≦
x, which first component acts as a sensitizer in said medium, and wherein a second component is capable of emitting light at a second wavelength region y≦
λ
2≦
z, which second component acts as an emissive component in said medium, wherein λ
2≦
λ
1, and wherein, upon absorption of light by said first component at said first wavelength region λ
1, said emissive component emits light at said second wavelength region λ
2, and wherein said first component and said second component are organic compounds, wherein said first component and said second component are distributed in said matrix which matrix is a solid, a gel or a fluid with viscosity equal or higher than 0.59×
10−
3 Pa·
s, wherein said medium optionally comprises further pairs of sensitizer and emissive components, as defined above, but having different absorption and, optionally, emission wavelength regions,said device optionally further comprising a light transparent container for containing said medium, or optionally comprising a light transparent substrate for carrying said medium.
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Abstract
The present invention relates to a device for modifying, e.g. narrowing the wavelength range of a spectrum of light.
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Citations
51 Claims
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1. A device for modifying, e.g. narrowing the wavelength range of a spectrum of light incident on said device, such that light emitted from said device has a modified, e.g. more narrow wavelength range in comparison to said incident light, said device comprising
a medium for photon energy up-conversion comprising at least two components and a matrix in which said at least two components are distributed, wherein a first component is capable of absorbing light at a first wavelength region w≦ - λ
1≦
x, which first component acts as a sensitizer in said medium, and wherein a second component is capable of emitting light at a second wavelength region y≦
λ
2≦
z, which second component acts as an emissive component in said medium, wherein λ
2≦
λ
1, and wherein, upon absorption of light by said first component at said first wavelength region λ
1, said emissive component emits light at said second wavelength region λ
2, and wherein said first component and said second component are organic compounds, wherein said first component and said second component are distributed in said matrix which matrix is a solid, a gel or a fluid with viscosity equal or higher than 0.59×
10−
3 Pa·
s, wherein said medium optionally comprises further pairs of sensitizer and emissive components, as defined above, but having different absorption and, optionally, emission wavelength regions,said device optionally further comprising a light transparent container for containing said medium, or optionally comprising a light transparent substrate for carrying said medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification