Wide-bandgap, lattice-mismatched window layer for a solar...

Details Wide-bandgap, lattice-mismatched window layer for a solar... Wide-bandgap, lattice-mismatched window layer for a solar...

2006-10-10

2006-10-10

Nguyen, Nam (Department: 1753)

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

C136S261000, C136S262000, C438S057000

Reexamination Certificate

active

07119271

ABSTRACT:
A photovoltaic cell or other optoelectronic device having a wide-bandgap semiconductor used in the window layer. This wider bandgap is achieved by using a semiconductor composition that is not lattice-matched to the cell layer directly beneath it and/or to the growth substrate. The wider bandgap of the window layer increases the transmission of short wavelength light into the emitter and base layers of the photovoltaic cell. This in turn increases the current generation in the photovoltaic cell. Additionally, the wider bandgap of the lattice mismatched window layer inhibits minority carrier injection and recombination in the window layer.

REFERENCES:
patent: 4255211 (1981-03-01), Fraas
patent: 4935384 (1990-06-01), Wanlass
patent: 5944913 (1999-08-01), Hou et al.
patent: 6252287 (2001-06-01), Kurtz et al.

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