LIGHT EMITTING DIODE, PHOTODIODE, DISPLAYS, AND METHOD FOR FORMING THE SAME
First Claim
1. A light-emitting diode (LED), comprising:
- a photonic resonant cavity antenna comprising;
(a) a top metallic layer that is light transmissive and has a lateral structure smaller than wavelength of the light;
(b) a bottom metallic layer; and
(c) a light emitting material layer of semiconductor positioned between the top metallic layer and the bottom metallic layer for generated lightwhereas the generated light transmitted through the top metallic layer, and whereas the LED has a low reflection to an ambient light, improved light generation in the cavity and/or improved light transmission to outside the cavity, and improved contrast.
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Abstract
The present invention is related to solid state light emitting diodes (LEDs), photodetector/photovoltaic devices, displays, applications and methods for making the same. As demonstrated experimentally, the LEDs, as disclosed herein, have high light emission efficiency, high contrast, high brightness, low ambient light reflection, low light glare, and a tunable display viewing angle. The same LED disclosed here can be used as high efficiency displays and high efficiency photovoltaic device or photodetectors. This means that the same device, where used in array form, can be used as the display (LED operation mode) and power supply (photovoltaic device mode) and camera (photodetector and imaging mode).
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Citations
26 Claims
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1. A light-emitting diode (LED), comprising:
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a photonic resonant cavity antenna comprising; (a) a top metallic layer that is light transmissive and has a lateral structure smaller than wavelength of the light; (b) a bottom metallic layer; and (c) a light emitting material layer of semiconductor positioned between the top metallic layer and the bottom metallic layer for generated light whereas the generated light transmitted through the top metallic layer, and whereas the LED has a low reflection to an ambient light, improved light generation in the cavity and/or improved light transmission to outside the cavity, and improved contrast. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for forming a light-emitting diode (LED), comprising:
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forming a metallic-mesh electrode with subwavelength hole-array (MESH) layer that is transmissive to a light emitted by the LED and that has at least one lateral structure smaller than a wavelength of the light; forming a backplane layer; and forming a light-emitting material layer positioned between the top metallic layer and the backplane layer, wherein the light-emitting material layer is grown by using at least one of low temperature molecule beam epitaxy and thin film deposition. - View Dependent Claims (24, 25, 26)
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Specification