Thin film solar cell manufacturing and integration
AssigneeSoloPower, Inc.
InventorBulent M. Basol
Life of this patent
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Abstract
A method of forming a Group IBIIIAVIA solar cell absorber which includes an active portion and an electrically resistive portion. The absorber is interposed between a base layer and a transparent conductive layer. The electrically resistive portion increases resistance between the base layer and a connector layer that is formed on the transparent conductive layer. The connector layer comprises the busbar and the fingers of the solar cell. The busbar is preferably placed over the electrically resistive portion while the fingers extend over the active portion of the absorber layer.
Claims19
A solar cell structure, comprising:
- a base;
- a single contiguous layer formed on the base, the single contiguous layer including a first portion and a second portion that is adjacent to and different than the first portion such that each of the first and the second portions are each formed on the base and the second portion forms a pattern, wherein the electrical resistivity of the second portion is higher than the electrical resistivity of the first portion, wherein the first portion forms an absorber to receive light, and wherein and the first portion comprises a Group IA material while the second portion does not contain the Group IA material;
- a transparent conductive layer formed on the single contiguous layer;
- and
- a metallic connector formed on the transparent conductive layer, the metallic connector having a primary connector and secondary connectors attached to the primary connector, wherein the primary connector is substantially positioned over the pattern formed by the second portion of the single contiguous layer that is adjacent to the first portion of the single contiguous layer without extending over the first portion of the single contiguous layer.
A solar cell structure, comprising:
- a base;
- a layer formed on the base, and including a first portion and a second portion that is adjacent to and different than the first portion such that each of the first and the second portions are each formed on the base and the second portion forms a pattern, wherein the first portion includes at least one Group IB material and at least one Group IIIA material, wherein the second portion includes at least one Group IB material and at least one Group IIIA material, wherein the molar ratio of Group IB material to Group IIIA material in the second portion is lower than the molar ratio of Group IB material to Group IIIA material in the first portion, and wherein the electrical resistivity of the second portion is higher than the electrical resistivity of the first portion, and wherein the first portion forms an absorber layer;
- a transparent conductive layer formed on the layer;
- and
- a metallic connector formed on the transparent conductive layer, the metallic connector having a primary connector and secondary connectors attached to the primary connector, wherein the primary connector is substantially positioned over the pattern formed by the second portion of the layer that is adjacent to the first portion of the layer without extending over the first portion of the layer.
Dependencies are inferred from the claim text.