Silicon nanowire solar cells
Abstract
Silicon nanowire-based solar cells on metal foil are described. The key benefits of such devices are discussed, followed by optical reflectance, current-voltage, and external quantum efficiency data for a cell design employing a thin amorphous silicon layer deposited on the nanowire array to form the p-n junction. A promising current density of ∼1.6mA /cm2 for 1.8cm2 cells was obtained, and a broad external quantum efficiency was measured with a maximum value of ∼12% at 690nm. The optical reflectance of the silicon nanowire solar cells is reduced by one to two orders of magnitude compared to planar cells.
- Publication:
-
Applied Physics Letters
- Pub Date:
- December 2007
- DOI:
- 10.1063/1.2821113
- Bibcode:
- 2007ApPhL..91w3117T
- Keywords:
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- 84.60.Jt;
- Photoelectric conversion: solar cells and arrays