Devices, systems, and methods for harvesting energy and methods for forming such devices

• US 8,338,772 B2
• Filed: 12/06/2011
• Issued: 12/25/2012
• Est. Priority Date: 11/13/2007
• Status: Active Grant

• Current Assignee: Battelle Energy Alliance LLC (Battelle Memorial Institute)
• Original Assignee: Battelle Energy Alliance LLC (Battelle Memorial Institute)
• Inventors: Kotter, Dale K., Novack, Steven D.
• Primary Examiner(s): Ko, Tony
• Application Number:
  US13/311,874
• Publication Number:
  US 20120080073A1
• Time in Patent Office: 385 Days
• Field of Search: 250/353, 250/208.2
• US Class Current: 250/208.2
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H02S 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

Energy harvesting devices include a substrate coupled with a photovoltaic material and a plurality of resonance elements associated with the substrate. The resonance elements are configured to collect energy in at least visible and infrared light spectra. Each resonance element is capacitively coupled with the photovoltaic material, and may be configured to resonate at a bandgap energy of the photovoltaic material. Systems include a photovoltaic material coupled with a feedpoint of a resonance element. Methods for harvesting energy include exposing a resonance element having a resonant electromagnetic radiation having a frequency between approximately 20 THz and approximately 1,000 THz, absorbing at least a portion of the electromagnetic radiation with the resonance element, and resonating the resonance element at a bandgap energy of an underlying photovoltaic material. Methods for forming an energy harvesting device include forming resonance elements on a substrate and capacitively coupling the resonance elements with a photovoltaic material.

Claims

1. An energy harvesting device, comprising:

a photovoltaic material;

a substrate coupled with the photovoltaic material; and

a plurality of resonance elements associated with the substrate and capacitively coupled with the photovoltaic material, wherein each resonance element of the plurality of resonance elements is configured to collect energy in at least visible and infrared light spectra, wherein each resonance element of the plurality of resonance elements is configured to resonate at a bandgap energy of the photovoltaic material.

2. The energy harvesting device of claim 1, wherein each resonance element of the plurality of resonance elements has a geometry selected from the group consisting of circular loop, concentric loops, square spiral, circular spiral, slot, cross, and dipole.

3. The energy harvesting device of claim 1, wherein each resonance element of the plurality of resonance elements comprises a complementary geometry to generate surface currents that are additive and focus the energy at a central feedpoint.

4. The energy harvesting device of claim 1, wherein each resonance element of the plurality of resonance elements has an omni-directional field-of-view.

5. The energy harvesting device of claim 1, wherein the plurality of resonance elements are formed on the substrate.

6. The energy harvesting device of claim 1, wherein the photovoltaic material comprises a sub-wavelength sized photovoltaic material.

7. The energy harvesting device of claim 6, wherein the photovoltaic material comprises a bandgap-engineering superlattice material.

8. The energy harvesting device of claim 1, wherein the substrate comprises at least one of a polyethylene, a polypropylene, an acrylic, a fluoropolymer, a polystyrene, a poly methylmethacrylate (PMMA), a polyethylene terephthalate, a polyimide, and a polyolefin.

9. The energy harvesting device of claim 1, wherein the substrate has a thickness of approximately one-quarter of a wavelength at which the each resonance element of the plurality of resonance elements is configured to resonate.

10. A method for harvesting energy, the method comprising:

exposing at least one resonance element to electromagnetic radiation having a frequency between approximately 20 THz and approximately 1,000 THz;

absorbing at least a portion of the electromagnetic radiation with the at least one resonance element; and

resonating the at least one resonance element at a bandgap energy of an underlying photovoltaic material responsive to the absorbed electromagnetic radiation.

11. The method of claim 10, further comprising capacitively coupling the at least one resonance element with the photovoltaic material.

12. The method of claim 11, wherein capacitively coupling the at least one resonance element with the photovoltaic material comprises coupling the at least one resonance element to a substrate having a thickness of approximately one-quarter of a wavelength of the electromagnetic radiation to which the at least one resonance element is exposed.

13. The method of claim 10, further comprising inducing electron-hole transfer in the photovoltaic material with energy radiated by the resonating of the at least one resonance element.

14. The method of claim 10, wherein exposing at least one resonance element to electromagnetic radiation comprises exposing a plurality of resonance elements to the electromagnetic radiation.

15. The method of claim 14, wherein exposing a plurality of resonance elements to the electromagnetic radiation comprises exposing a plurality of resonance elements each having a spiral loop shape with a central feedpoint to the electromagnetic radiation.

16. A method for forming an energy harvesting device, the method comprising:

forming a plurality of resonance elements on a substrate such that each resonance element of the plurality of resonance elements is configured to collect electromagnetic radiation in at least visible and infrared bands of light and to resonate at a bandgap energy of a photovoltaic material; and

capacitively coupling the plurality of resonance elements with the photovoltaic material.

17. The method of claim 16, further comprising coupling the photovoltaic material with the substrate having the plurality of resonance elements formed thereon.

18. The method of claim 17, wherein coupling the photovoltaic material with the substrate comprises at least one of overlaying, laminating, and bonding the substrate to the photovoltaic material.

19. The method of claim 16, wherein forming the plurality of resonance elements comprises forming the plurality of resonance elements each as a spiral loop of conductive material.

20. The method of claim 16, wherein forming the plurality of resonance elements on a substrate comprises forming the plurality of resonance elements on a substrate comprising at least one of a polyethylene, a polypropylene, an acrylic, a fluoropolymer, a polystyrene, a poly methylmethacrylate (PMMA), a polyethylene terephthalate, a polyimide, and a polyolefin.

21. The method of claim 16, wherein forming a plurality of resonance elements on a substrate comprises forming the plurality of resonance elements on a substrate having a thickness of approximately one-quarter of a wavelength of the electromagnetic radiation that each resonance element of the plurality of resonance elements is configured to collect.

22. An energy conversion system, comprising:

at least one resonance element having a feedpoint, wherein the at least one resonance element has a resonant frequency between about 20 THz and about 1,000 THz; and

a photovoltaic material coupled with the feedpoint of the at least one resonance element, the photovoltaic material structured to generate electrical current responsive to resonance of the at least one resonance element.

23. The energy conversion system of claim 22, wherein the photovoltaic material is at least one of embedded in and directly coupled with the feedpoint of the at least one resonance element.

24. The energy conversion system of claim 22, wherein the photovoltaic material comprises a multi-band gapped engineered photovoltaic material, and wherein the at least one resonance element exhibits at least one peak resonance within at least one bandgap of the multi-band gapped engineered photovoltaic material.

25. The energy conversion system of claim 22, further comprising a substrate associated with the at least one resonance element and having a thickness of approximately one-quarter of a resonance wavelength of the at least one resonance element.