HIGH EFFICIENCY PHOTOVOLTAIC CELLS WITH SELF CONCENTRATING EFFECT
First Claim
1. A photovoltaic cell comprising:
- a substrate having a top surface;
wherein said top surface of the substrate has a three-dimensional geometric pattern etched from the substrate, or formed on the substrate;
wherein the three-dimensional geometric pattern comprising, an array of quintic, or quintic-like, or truncated quintic, or truncated quintic-like, or the combination thereof, shaped nano-scaled or micrometer-scaled protruding structures;
an absorption layer, wherein the absorption layer comprises;
at least one pn-Junction, wherein the at least one pn-Junction comprises;
at least one first electrical material of p or n type, and;
at least one second electrical material of opposite type to the at least one first electrical material, wherein said at least one first electrical material is overlaying the protruding structures, and;
a pair of electrodes placed, wherein the pair of electrodes electrically connects to the pn-unction,wherein said substrate is being a single piece of material.
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Abstract
This invention relates to a novel structure of photovoltaic devices (e.g. photovoltaic cells also called as solar cells) are provided. The cells are based on the micro or nano scaled structures which could not only increase the surface area but also have the capability of self-concentrating the light incident onto the photonics devices. More specifically, the structures are based on 3D structure including quintic or quintic-like shaped micor-nanostructures. By using such structures reflection loss of the light from the cell is significantly reduced, increasing the absorption, which results in increasing the conversion efficiency of the solar cell, and reducing the usage of material while increasing the flexibility of the solar cell. The structures can be also used in other optical devices wherein the reflection loss and absorption are required to enhanced to significantly improve the device performances.
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Citations
20 Claims
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1. A photovoltaic cell comprising:
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a substrate having a top surface; wherein said top surface of the substrate has a three-dimensional geometric pattern etched from the substrate, or formed on the substrate; wherein the three-dimensional geometric pattern comprising, an array of quintic, or quintic-like, or truncated quintic, or truncated quintic-like, or the combination thereof, shaped nano-scaled or micrometer-scaled protruding structures; an absorption layer, wherein the absorption layer comprises; at least one pn-Junction, wherein the at least one pn-Junction comprises; at least one first electrical material of p or n type, and; at least one second electrical material of opposite type to the at least one first electrical material, wherein said at least one first electrical material is overlaying the protruding structures, and; a pair of electrodes placed, wherein the pair of electrodes electrically connects to the pn-unction, wherein said substrate is being a single piece of material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A photovoltaic cell comprising:
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a substrate having a top surface; wherein said top surface of the substrate has a three-dimensional geometric pattern etched from the substrate, or formed on the substrate; wherein the three-dimensional geometric pattern comprising; an array of quintic, or quintic-like, or truncated quintic, or truncated quintic-like, or the combination thereof, shaped nano-scaled or micrometer-scaled protruding structures; an absorption layer, wherein the absorption layer comprises; at least one pn-junction, wherein the at least one pn-junction comprises; at least one first electrical material of p or n type, and; at least one second electrical material of opposite type to the at least one first electrical material, wherein said at least one first electrical material Is overlaying the protruding structures; a pair of electrodes, wherein the pair of electrodes electrically connects to the at least one pn-unction, and; at least one reflecting layer to reflect back and forth a radiation until fully absorbed, wherein the substrate is being a single piece of material. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A photovoltaic cell comprising:
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a substrate having a top surface; wherein said top surface of the substrate has a three-dimensional geometric pattern etched from the substrate, or formed on the substrate; wherein the three-dimensional geometric pattern comprising; an array of quintic, or quintic-like, or truncated quintic, or truncated quintic-like, or the combination thereof, shaped nano-scaled or micrometer-scaled protruding structures; an absorption layer, wherein the absorption layer comprises; at least one pn-Junction, wherein the at least one pn-Junction comprises; at least one first electrical material of p or n type, and; at least one second electrical material of opposite type to the at least one first electrical material, wherein said at least one first electrical material is overlaying the protruding structures; a pair of electrodes, wherein the pair of electrodes electrically connects to the at least one pn-Junction, and; an antireflecting layer, wherein the substrate is being a single piece of material. - View Dependent Claims (17, 18, 19, 20)
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Specification