Thin layer solar cell module and method for producing it
View Patent ↗The invention concerns a process for producing a thin layer solar cell module with a plurality of segments that are electrically connected in series and arranged on a common substrate. The invention additionally concerns the corresponding thin layer solar cell modules and a production line that is suitable for conducting the production process. The process has steps for application of layers onto the substrate to form at least one electrode and one photoactive layer sequence and has steps for structuring the applied and/or to be applied layers to form the plurality of segments. At least one electrode and one photoactive layer sequence are applied before structuring steps are carried out.
1. A process for producing a thin layer solar cell module with a plurality of segments that are electrically connected in series and arranged on a common substrate, with the process comprising:
applying layers to the substrate to form at least one electrode, and one photoactive layer sequence and a further electrode such that the photoactive layer sequence is arranged between the electrode and the further electrode; and
structuring the applied and/or to be applied layers to form the plurality of segments,
wherein the at least one electrode, and the one photoactive layer sequence and the further electrode are applied before the structuring is carried out; and
wherein structuring of already applied layers comprises creating a contact line by laser radiation.
2. The process according to claim 1 , wherein forming an electrode comprises applying at least one layer of a transparent conductive oxide and/or a metal layer.
3. The process according to claim 1 , wherein forming the one photoactive layer sequence comprises applying at least one individual layer of amorphous or microcrystalline Si and/or amorphous or microcrystalline SiGe and/or a compound semiconductor.
4. The process according to claim 1 , wherein applying the layers comprises performing a PVD process, and/or a CVD process.
5. The process according to claim 1 , wherein the substrate comprises glass.
6. The process according to claim 1 , wherein a structuring of already applied layers comprises creating a separating line by laser radiation and/or by mechanical scoring and/or by selective etching.
7. The process according to claim 1 , wherein laser light is directed so that overlying layers of different materials become locally heated and a material compound is formed that has physical properties that differ from original materials.
8. The process according to claim 1 , wherein structuring of subsequently to be applied layers takes place by means of a cover line made of a soluble material.
9. A thin layer solar cell module with a plurality of segments that are electrically connected in series, which is produced by a process according to claim 1 .
10. The process according to claim 3 , wherein forming the one photoactive layer sequence comprises applying a p-doped, an intrinsic and an n-doped layer of amorphous Si and/or a p-doped, an intrinsic and an n-doped layer of microcrystalline Si and/or a p-doped, an intrinsic or an n-doped layer of amorphous Si(Ge).
11. The process according to claim 6 , wherein laser light is directed so that one or more layers are locally removed.
12. The process according to claim 6 , wherein laser light is directed so that one or more layers are locally heated so that a physical property of at least one of the layers is changed.
13. The process according to claim 6 , wherein an isolating line is created from an electrically isolating material within the separating line.
14. The process according to claim 7 , wherein a melt of the different materials is locally formed and in which the material compound results from the melt.
15. The process according to claim 8 , wherein the cover line is applied by an ink jet printing process.
16. The process according to claim 13 , wherein the isolating line is applied by an ink jet printing process.