Converging solar cell element
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKyoichi Tange, Tomonori Nagashima
Life of this patent
Estimating the term…
Abstract
For a converging solar cell element capable of preventing excessive concentration of converged sunlight to one point without lowering the degree of light convergence, a p+ layer 14 and an n+ layer 12 are formed on the rear surface of a silicon substrate; a positive pole 16 and a negative pole 18 are formed in response to the respective layers; and, on the front surface side, a light receiving surface 24 is formed with a bank portion 28 which enhances intensity in the surrounding area. In the central portion of the light receiving surface 24, a projected portion 26 is formed, which scatters converged sunlight and prevents the concentration of converged sunlight to one point.
Claims4
A converging solar cell element comprising a silicon substrate having a front surface or a light receiving surface and a rear surface on which electrodes are formed, wherein said front surface or light receiving surface is provided with one projected portion, and
- wherein the projected portion is provided at the center of said front surface or light receiving surface and has a bottom area between 1/5 to 1/20 of the area of said front surface or light receiving surface.
A converging solar cell element comprising a silicon substrate having a front surface or a light receiving surface and a rear surface on which electrodes are formed, wherein said front surface or light receiving surface is provided with two or more projected portions, and
- wherein said two or more projected portions are arranged at a regular interval about a central portion of said front surface or light receiving surface and have a total bottom area between 1/5 to 1/20 of the area of said front surface or light receiving surface.
Dependencies are inferred from the claim text.