Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Reexamination Certificate
2011-03-29
2011-03-29
Barton, Jeffrey T (Department: 1725)
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
C136S244000, C136S252000, C136S258000, C136S261000
Reexamination Certificate
active
07915522
ABSTRACT:
A novel surface texturing provides improved light-trapping characteristics for photovoltaic cells. The surface is asymmetric and includes shallow slopes at between about 5 and about 30 degrees from horizontal as well as steeper slopes at about 70 degrees or more from horizontal. It is advantageously used as either the front or back surface of a thin semiconductor lamina, for example between about 1 and about 20 microns thick, which comprises at least the base or emitter of a photovoltaic cell. In embodiments of the present invention, the shallow slopes are formed using imprint photolithography.
REFERENCES:
patent: 3990101 (1976-11-01), Ettenberg et al.
patent: 4137123 (1979-01-01), Bailey et al.
patent: 4379944 (1983-04-01), Borden et al.
patent: 5080725 (1992-01-01), Green et al.
patent: 6146979 (2000-11-01), Henley et al.
patent: 2003/0178057 (2003-09-01), Fujii et al.
patent: 2007/0277874 (2007-12-01), Dawson-Elli et al.
patent: 2008/0070340 (2008-03-01), Borrelli et al.
patent: 2009/0142874 (2009-06-01), Arai
Nelson, Jenny, “The Physics of Solar Cells”, Imperial College Press, (2006), chapter 9.
Campbell and Green (J. Appl. Phys. 62 p. 247. 1987), “Light trapping properties of pyramidally textured surfaces”.
Weber et. al, Prog. Photovolt: Res. Appl. 2005 13:691-695, “A novel silicon texturization method based on etching through a silicon nitride mask”.
Chang, et. al. (47th International Conference on Electron, Ion, and Photo Beam Technology & Nanofabrication, 2003), “Fabrication of Saw-tooth Diffraction Graftings using Nanoimprint Lithography”.
Sobajima et al., “Novel Light-Trapping Structure Having Smooth Surface for Silicon Thin-Film Solar Cell”, 33rd IEEE Photovoltaic Specialists Conference, 2008.
Barton Jeffrey T
Bourke Allison
The Mueller Law Office, P.C.
Twin Creeks Technologies, Inc.
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