Transparent contacts for organic devices
First Claim
1. A light emitting device including at least one organic light emitting device (OLED) that is substantially transparent (TOLED) when de-energized, comprising:
- a substantially transparent substrate having top and bottom surfaces;
a first substantially transparent thin film coating of indium tin oxide (ITO) applied to the top surface of said substrate;
a substantially transparent coating of a hole conducting material applied over said ITO layer;
a substantially transparent layer of an electron conducting and highly electroluminescent organic material overlaying said ITO layer;
a relatively thin film of a substantially transparent metal electrode applied over said organic material layer;
a second substantially transparent thin film coating of ITO overlying said metal electrode film; and
first and second electrical contacts bonded to said first and second ITO layers for receiving a bias voltage to energize said device, and cause it to emit light of a given color from top and bottom surfaces thereof.
1 Assignment
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Accused Products
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.
2003 Citations
29 Claims
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1. A light emitting device including at least one organic light emitting device (OLED) that is substantially transparent (TOLED) when de-energized, comprising:
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a substantially transparent substrate having top and bottom surfaces; a first substantially transparent thin film coating of indium tin oxide (ITO) applied to the top surface of said substrate; a substantially transparent coating of a hole conducting material applied over said ITO layer; a substantially transparent layer of an electron conducting and highly electroluminescent organic material overlaying said ITO layer; a relatively thin film of a substantially transparent metal electrode applied over said organic material layer; a second substantially transparent thin film coating of ITO overlying said metal electrode film; and first and second electrical contacts bonded to said first and second ITO layers for receiving a bias voltage to energize said device, and cause it to emit light of a given color from top and bottom surfaces thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A light emitting device including at least one organic light emitting device (OLED) that is substantially transparent (TOLED) when de-energized, comprising:
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a substantially transparent substrate having top and bottom surfaces; a first substantially transparent thin film coating of electrically conductive material applied to the top surface of said substrate; at least one substantially transparent layer including a highly electroluminescent organic material overlying said first layer of electrically conductive material; a second substantially transparent thin film coating of electrically conductive material overlying said layer of organic material; and first and second electrical contacts bonded to said first and second electrically conductive coatings for receiving a bias voltage to energize said device, and cause it to emit light of a given color from top and bottom surfaces thereof. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification