Back to results
US 2018/0006180 A1Published application
Wafer bonded solar cells and fabrication methods
AssigneeInternational Business Machines Corporation
InventorsSTEPHEN W. BEDELL, CHENG-WEI CHENG, JEEHWAN KIM, DEVENDRA K. SADANA, KUEN-TING SHIU, NORMA E. SOSA CORTES
Life of this patent
Estimating the term…
Abstract
A photovoltaic device and method for fabrication include multijunction cells, each cell having a material grown independently from the other and including different band gap energies. An interface is disposed between the cells and configured to wafer bond the cells wherein the cells are configured to be adjacent without regard to lattice mismatch.
Claims20
A photovoltaic device, comprising:
- at least two light-responsive cells stacked in series, each cell having a material formed independently of the other and each including different band gap energies and having different lattice constants;
- and
- an interface layer of a transparent conductive material disposed between each pair of the at least two light-responsive cells.
A photovoltaic device, comprising:
- four light-responsive cells stacked in series, each cell having a material with a different band gap energy and a different lattice constant from each of the other light-responsive cells;
- and
- three interface layers, wherein one of the three interface layers is disposed between each pair of the four light-responsive cells.
A photovoltaic device, comprising:
- four light-responsive cells including a top cell with a band gap energy of about 1.8 electron-volts, a second cell adjacent to the top cell with a band gap energy of about 1.4 electron-volts, a third cell adjacent to the second cell with a band gap energy of about 1.0 electron-volts and a bottom cell adjacent to the third cell with a band gap energy of about 0.6 electron-volts;
- and
- an interface layer between at least one pair of the four light-responsive cells, wherein each interface layer is a transparent conductive oxide (TCO).
Dependencies are inferred from the claim text.