Transparent contacts for organic devices
First Claim
1. An organic light emitting device structure, comprising:
- a substrate;
a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;
a transparent organic light emitting device formed over the first electrically conductive layer;
a transparent electrically conductive metal layer having a thickness less than about 100 angstroms formed over the transparent organic light emitting device; and
a second electrically conductive layer formed over the transparent electrically conductive metal layer, wherein the second electrically conductive layer has a negative polarity, and wherein the second electrically conductive layer comprises a material selected from the group consisting of a transparent electrically conductive oxide and a transparent electrically conductive polymer.
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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. The devices are substantially transparent when de-energized, making them useful for heads-up display applications.
334 Citations
49 Claims
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1. An organic light emitting device structure, comprising:
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a substrate;
a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;
a transparent organic light emitting device formed over the first electrically conductive layer;
a transparent electrically conductive metal layer having a thickness less than about 100 angstroms formed over the transparent organic light emitting device; and
a second electrically conductive layer formed over the transparent electrically conductive metal layer, wherein the second electrically conductive layer has a negative polarity, and wherein the second electrically conductive layer comprises a material selected from the group consisting of a transparent electrically conductive oxide and a transparent electrically conductive polymer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An organic light emitting device structure, comprising:
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a substrate;
a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;
a transparent organic light emitting device formed over the first electrically conductive layer;
a transparent electrically conductive metal layer having a thickness less than about 100 angstroms formed over the transparent organic light emitting device, wherein the transparent electrically conductive metal layer comprises magnesium and silver; and
an indium tin oxide layer formed over the transparent electrically conductive metal layer, wherein the indium tin oxide layer has a negative polarity. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An organic light emitting device structure, comprising:
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a substrate;
a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;
a hole transporting layer formed over the first electrically conductive layer;
an electron transporting layer formed over the hole transporting layer;
a transparent electrically conductive metal layer formed over the electron transporting layer, wherein the metal has a work function less than 4 eV; and
a second electrically conductive layer formed over the transparent electrically conductive metal layer, wherein the second electrically conductive layer has a negative polarity, and wherein the second electrically conductive layer comprises a material selected from the group consisting of a transparent electrically conductive oxide and a transparent electrically conductive polymer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An organic light emitting device structure, comprising:
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a substrate;
a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;
a hole transporting layer formed over the first electrically conductive layer;
an electron transporting layer formed over the hole transporting layer;
a layer comprising magnesium and silver formed over the electron transporting layer; and
an indium tin oxide layer formed over the layer comprising magnesium and silver, wherein the indium tin oxide layer has a negative polarlity. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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39. An organic light emitting device structure, comprising:
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a substrate;
a first electrically conductive layer formed over the substrate, wherein the first electrically conductive layer has a positive polarity;
a hole transporting layer formed over the first electrically conductive layer;
an electron transporting layer formed over the hole transporting layer;
an electrically conductive metal layer formed over the electron transporting layer, wherein the electrically conductive metal layer has a thickness of 50-400 angstroms; and
a transparent electrically conductive oxide layer formed over the electrically conductive metal layer, wherein the transparent electrically conductive oxide layer has a negative polarity. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification