HIGH PERFORMANCE LIGHT-EMITTING DEVICES
First Claim
1. A light emitting device in the form of a layered structure comprising:
- a passive bottom multilayer stack including a cathode layer;
a cavity layer including a light emitting region;
a passive top multilayer stack including a hole transport layer, and a transparent anode layer,said passive bottom and top multilayer stacks being devoid of a light emitting layer;
a transparent substrate located over said top multilayer stack and through which light is emitted from the device; and
at least one functional additional layer group in said passive top multilayer stack controlling the reflectance of the passive top multilayer stack and phase changes occurring upon reflection from said passive top multilayer stack in said cavity layer.
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Abstract
A light emitting device in the form of a layered structure has a passive bottom multilayer stack including a cathode layer, a cavity layer including a light emitting region, a passive top multilayer stack including a hole transport layer, and a transparent anode layer. The passive bottom and top multilayer stacks are devoid of a light emitting layer. A transparent substrate, through which light is emitted from the device, is located over the top multilayer stack. At least one functional additional layer group in the passive top multilayer stack controls the reflectance of the passive top multilayer stack and phase changes occurring upon reflection from the passive top multilayer stack in the cavity layer.
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Citations
11 Claims
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1. A light emitting device in the form of a layered structure comprising:
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a passive bottom multilayer stack including a cathode layer; a cavity layer including a light emitting region; a passive top multilayer stack including a hole transport layer, and a transparent anode layer, said passive bottom and top multilayer stacks being devoid of a light emitting layer; a transparent substrate located over said top multilayer stack and through which light is emitted from the device; and at least one functional additional layer group in said passive top multilayer stack controlling the reflectance of the passive top multilayer stack and phase changes occurring upon reflection from said passive top multilayer stack in said cavity layer. - View Dependent Claims (2, 3, 4)
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5. A light emitting device in the form of a layered structure comprising:
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a passive bottom multilayer stack including a cathode layer; a cavity layer including a light emitting region; a passive top multilayer stack including a hole transport layer, and a transparent anode layer; said passive bottom and top multilayer stacks being devoid of a light emitting layer; a transparent substrate over said top multilayer stack through which light is emitted from the device; at least one additional absorptive layer group in said top multilayer stack reducing the external reflectance of the passive top multilayer stack; and a layer of conductive material having high reflectance and low absorption on the inside of said passive top multilayer stack to increase the internal reflectance of said passive top multilayer stack. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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Specification