Light-emitting device with organic layer doped with photoluminescent material
First Claim
1. A light-emitting device comprising:
- an anode;
a cathode; and
at least one organic electroluminescent (“
EL”
) material disposed between the anode and the cathode, the organic EL material having a plurality of nanoparticles of at least one photoluminescent (“
PL”
) material dispersed therein, the organic EL material being capable of emitting a first electromagnetic (“
EM”
) radiation having a first spectrum in response to an electrical voltage applied through the anode and the cathode, and the PL material being capable of absorbing a portion of the first EM radiation and emitting a second EM radiation having a second spectrum.
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Accused Products
Abstract
A light-emitting device includes an anode, a cathode, and at least one organicpositioned between the anode and the cathode. Nanoparticles of at least one photoluminescent material are dispersed in the organic EL material. The organic EL material emits a first electromagnetic (“EM”) radiation having a first spectrum in response to an applied electrical field. The PL material absorbs a portion of the first EM radiation emitted by the organic EL material and emits a second EM radiation having a second spectrum. A plurality of the light-emitting devices are arranged on a transparent substrate to provide a panel display or a lighting source.
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Citations
56 Claims
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1. A light-emitting device comprising:
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an anode;
a cathode; and
at least one organic electroluminescent (“
EL”
) material disposed between the anode and the cathode, the organic EL material having a plurality of nanoparticles of at least one photoluminescent (“
PL”
) material dispersed therein, the organic EL material being capable of emitting a first electromagnetic (“
EM”
) radiation having a first spectrum in response to an electrical voltage applied through the anode and the cathode, and the PL material being capable of absorbing a portion of the first EM radiation and emitting a second EM radiation having a second spectrum. - 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, 35, 41, 43, 49, 52, 54, 55, 56)
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29. A light-emitting device comprising:
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an anode disposed on a substantially transparent substrate;
a hole injection enhancement material disposed on the anode and opposite the substrate;
a hole transport material disposed on the hole injection enhancement material and opposite the anode;
at least one organic EL material disposed on the hole transport material and opposite the hole injection enhancement material, the organic EL material having a plurality of nanoparticles of at least one first PL material dispersed therein, the organic EL material emitting a first EM radiation having a first spectrum in response to an applied electrical voltage, and the first PL material absorbing a portion of the first EM radiation having the first spectrum and emitting a second EM radiation having a second spectrum;
an electron injection enhancement and transport material disposed on the organic EL material and opposite the hole transport material; and
a cathode;
the electrical voltage being applied through the anode and the cathode. - View Dependent Claims (30, 31, 32, 33, 34, 36, 42, 50, 53)
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37. A light-emitting panel display comprising
a substantially transparent panel; -
an anode disposed on the panel;
a plurality of light-emitting objects disposed on the anode and opposite the panel, each of the objects comprising at least one organic EL material having nanoparticles of at least one PL material dispersed therein, the organic EL material being capable of emitting a first EM radiation having a first spectrum in response to an applied electrical voltage, the PL material being capable of absorbing a portion of the first EM radiation and emitting a second EM radiation having a second spectrum; and
at least one cathode disposed on the organic EL material and opposite the anode. - View Dependent Claims (38, 39, 40)
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44. A method for making a light-emitting device, said method comprising:
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providing a substantially transparent substrate;
depositing a first material on the substrate to form an anode;
depositing second material on the anode, said second material comprising at least one organic EL material having a plurality of nanoparticles of at least one PL material dispersed therein, the organic EL material being capable of emitting a first EM radiation having a first spectrum in response to an electrical voltage applied through the anode and the cathode, and the PL material being capable of absorbing a portion of the first EM radiation and emitting a second EM radiation having a second spectrum; and
depositing a third material on the organic EL material to form a cathode. - View Dependent Claims (45, 46, 47, 48)
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51. A method for making a light-emitting panel display, said method comprising:
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providing a substantially transparent substrate panel;
depositing an anode material on the substrate panel to form an anode;
depositing a plurality of mixtures of organic EL materials on the anode, each of said mixtures of organic EL materials comprising at least one organic EL material having a plurality of nanoparticles of at least one PL material dispersed therein, each of said organic EL materials being capable of emitting a first EM radiation having a first spectrum in response to an electrical voltage applied through the anode and the cathode, and the PL material being capable of absorbing a portion of the first EM radiation and emitting a second EM radiation having a second spectrum; and
depositing a cathode material on each of the organic EL materials to form a plurality of cathodes.
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Specification