Organic light emitting devices
First Claim
1. An organic light emitting device structure, comprising:
- a substrate;
a first electrically conductive material formed over the substrate;
a first organic layer comprising a first organic emissive structure formed over the first electrically conductive material;
a second electrically conductive material formed over the first organic emissive structure;
a second organic layer comprising a second organic emissive structure formed over the second electrically conductive material; and
a third electrically conductive material formed over the second organic emissive structure;
wherein the organic emissive structures are transparent and the first and second organic emissive structures independently emit light when energized.
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Abstract
A multicolor organic light emitting device employs vertically stacked layers of double heterostructure devices which are fabricated from organic compounds. The vertical stacked structure is formed on a glass base having a transparent coating of ITO or similar metal to provide a substrate. Deposited on the substrate is the vertical stacked arrangement of three double heterostructure devices, each fabricated from a suitable organic material. Stacking is implemented such that the double heterostructure with the longest wavelength is on the top of the stack. This constitutes the device emitting red light on the top with the device having the shortest wavelength, namely, the device emitting blue light, on the bottom of the stack. Located between the red and blue device structures is the green device structure. The devices are configured as stacked to provide a staircase profile whereby each device is separated from the other by a thin transparent conductive contact layer to enable light emanating from each of the devices to pass through the semitransparent contacts and through the lower device structures while further enabling each of the devices to receive a selective bias.
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Citations
25 Claims
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1. An organic light emitting device structure, comprising:
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a substrate; a first electrically conductive material formed over the substrate; a first organic layer comprising a first organic emissive structure formed over the first electrically conductive material; a second electrically conductive material formed over the first organic emissive structure; a second organic layer comprising a second organic emissive structure formed over the second electrically conductive material; and a third electrically conductive material formed over the second organic emissive structure; wherein the organic emissive structures are transparent and the first and second organic emissive structures independently emit light when energized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An organic light emitting device structure, comprising:
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a substrate; a first electrically conductive material formed over the substrate; first and second organic layers comprising first and second organic emissive structures, respectively, stacked one over the other, to form a layered structure over the substrate; at least one electrically conductive material being disposed between the first and second organic emissive structures; and at least one electrically conductive material over the stack of said organic emissive structures; wherein the organic light emitting device structure is transparent; and wherein the first and second organic emissive structures independently emit light when energized. - View Dependent Claims (16)
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17. A transparent organic light emitting device comprising:
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a substrate; a first electrically conductive material over the substrate; a first organic layer comprising a first organic emissive structure formed over the first electrically conductive material; a second electrically conductive material over the first organic emissive structure; wherein at least one of said first and second electrically conductive materials (a) comprises a metal layer having a thickness less than about 100 Angstroms and (b) physically contacts said organic emissive structure. - View Dependent Claims (21, 22, 23, 24, 25)
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18. A transparent organic light emitting device comprising:
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a substrate; a first electrically conductive material over the substrate; a first organic layer comprising a first organic emissive structure formed over the electrically conductive material; and a second electrically conductive material over the first organic emissive structure; wherein at least one of said first and second electrically conductive materials comprises a metal layer having a thickness less than about 100 Angstroms; and wherein each layer between said first and second electrically conductive materials is a charge carrying material.
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19. A transparent organic light emitting device comprising:
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a substrate; a first electrically conductive material over the substrate; a first organic layer comprising a first organic emissive structure formed over the electrically conductive material; and a second electrically conductive material over the first organic emissive structure; wherein at least one of said first and second electrically conductive materials comprises a metal layer having a thickness of about 50 Angstroms or less.
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20. A transparent organic light emitting device comprising:
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a substrate; a first electrically conductive material over the substrate; a first organic layer comprising a first organic emissive structure formed over the electrically conductive material; and a second electrically conductive material over the first organic emissive structure; wherein at least one of said first and second electrically conductive materials comprises an indium tin oxide layer and a metal layer.
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Specification