Back to results
US 4,398,056 AGranted
Solar cell with reflecting grating substrate
AssigneeExxon Research & Engineering Co.
InventorPing Sheng
Life of this patent
Estimating the term…
Abstract
A solar cell which includes a thin layer of active material bounded on the side toward the incident light with an antireflection coating and bounded on the other side by a reflecting diffraction grating to internally reflect the incident light back into the active material.
Claims9
A solar cell comprising:
- (a) a rectangular diffraction grating coated with a layer of reflecting material on its grating surface;
- and
- (b) an active layer of semiconductor material formed on said layer of reflecting material;
- wherein said diffraction grating has a groove periodicity and depth such that enhancement of absorption of incident light within a desired wavelength range is optimized with respect to the index of refraction and the thickness of the active material and dielectric constant of said reflecting material.
1 more element
Dependencies are inferred from the claim text.