Organic light active devices with particulated light active material in a carrier matrix
First Claim
1. A voltage controlled light active device for emitting two or more colors of light, comprising:
- a first electrode;
a second electrode disposed adjacent to the first electrode and defining a gap therebetween;
a light active layer comprised of a mixture of a light active particulate and a conductive carrier material, said mixture being disposed within said gap,said light active particulate comprised offirst emitting particles including a first electroluminescent conjugated polymer, the first emitting particles emitting a number of photons of a first color in response to a first turn-on voltage applied to the electrodes and emitting a different number of photons of the first color in response to other turn-on voltages,said light active particulate further comprised of second emitting particles, the second emitting particles emitting a number of photons of a second color in response to a second turn-on voltage and a different number of photons of the second color in response to other turn-on voltages.
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Accused Products
Abstract
A light active device includes a semiconductor particulate dispersed within a carrier material. A first contact layer is provided so that on application of an electric field charge carriers having a polarity are injected into the semiconductor particulate through the conductive carrier material. A second contact layer is provided so that on application of the electric field to the second contact layer charge carriers having an opposite polarity are injected into the semiconductor particulate through the conductive carrier material. The semiconductor particulate comprises at least one of an organic and an inorganic semiconductor. The semiconductor particulate may comprise an organic light active particulate that includes at least one conjugated polymer. When an electric field is applied between the first and second contact layers to the semiconductor particulate through the conductive carrier material, the second contact layer becomes positive relative to the first contact layer and charge carriers of opposite polarity are injected into the semiconductor particulate. The opposite polarity charge carriers combine to form in the conjugated polymer charge carrier pairs which decay radiatively so that radiation is emitted from the conjugated polymer. In this case, the inventive light active device acts as a light emitting diode.
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Citations
4 Claims
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1. A voltage controlled light active device for emitting two or more colors of light, comprising:
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a first electrode; a second electrode disposed adjacent to the first electrode and defining a gap therebetween; a light active layer comprised of a mixture of a light active particulate and a conductive carrier material, said mixture being disposed within said gap, said light active particulate comprised of first emitting particles including a first electroluminescent conjugated polymer, the first emitting particles emitting a number of photons of a first color in response to a first turn-on voltage applied to the electrodes and emitting a different number of photons of the first color in response to other turn-on voltages, said light active particulate further comprised of second emitting particles, the second emitting particles emitting a number of photons of a second color in response to a second turn-on voltage and a different number of photons of the second color in response to other turn-on voltages.
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2. A light emitting device comprising:
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a first electrode; a second electrode disposed adjacent to said first electrode and defining a gap therebetween; a mixture comprising light active particulate dispersed within a conductive carrier material, said mixture being disposed within said gap and emitting light in response to an applied voltage, said light active particulate comprising a plurality of first particles having a first electroluminescent conjugated polymer emitting a first number of photons of a first color in response to a first turn-on voltage applied to said first and second electrodes and emitting a second number of photons of said first color in response to other turn-on voltages, and a plurality of second particles having a second electroluminescent conjugated polymer emitting a third number of photons of a second color in response to a second turn-on voltage applied to said first and second electrodes and fourth number of photons of the second color in response to said other turn-on voltages. - View Dependent Claims (3, 4)
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Specification