Solar cell and method for its manufacture
First Claim
1. A solar cell comprising a semiconductor substrate in which charge carriers can be generated by incident radiation energy, said charge carriers being separable by an electrical field and then conductible via electrically conducting contacts, said solar cell comprising:
- a. at least one semiconductor substrate surface having elevated areas with flanks,b. electrically conducting contacts for conducting charge carriers on said semiconductor substrate surface,c. a passivation layer comprising passivation material covering said semiconductor substrate at least in the area between said contacts, andd. said elevated areas having regions from which said passivation layer and, optionally semiconductor material, has been removed, said electrically conducting contacts being disposed on said regions and extending over said passivation layer along said flanks,there being a plateau-like area in said elevated areas, said flanks extending from said plateau-like areas, said semiconductor substrate material or a layer disposed thereon being provided in said plateau-like areas, and wherein said electrically conducting contacts extend over said plateau-like areas and along at least one flank extending therefrom.
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Accused Products
Abstract
A solar cell (10) with at least one semiconductor substrate surface (12) is proposed, having elevated areas (24, 26, 28) on which are provided electrically conducting contacts (20) for conducting charge carriers, and which are covered at least between the electrically conducting contacts by a passivation material (16). In order to manufacture solar cells with high efficiency using simple technology, the semiconductor substrate surface is completely or largely completely covered by the passivation material after formation of the elevated areas. Passivation material and if necessary semiconductor material present on the elevated areas is then removed from them. The material forming the electrically conducting contacts is then disposed on areas of the elevations thereby exposed.
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Citations
14 Claims
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1. A solar cell comprising a semiconductor substrate in which charge carriers can be generated by incident radiation energy, said charge carriers being separable by an electrical field and then conductible via electrically conducting contacts, said solar cell comprising:
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a. at least one semiconductor substrate surface having elevated areas with flanks, b. electrically conducting contacts for conducting charge carriers on said semiconductor substrate surface, c. a passivation layer comprising passivation material covering said semiconductor substrate at least in the area between said contacts, and d. said elevated areas having regions from which said passivation layer and, optionally semiconductor material, has been removed, said electrically conducting contacts being disposed on said regions and extending over said passivation layer along said flanks, there being a plateau-like area in said elevated areas, said flanks extending from said plateau-like areas, said semiconductor substrate material or a layer disposed thereon being provided in said plateau-like areas, and wherein said electrically conducting contacts extend over said plateau-like areas and along at least one flank extending therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification