Abstract
Thin film solar modules based on Cu(In,Ga)Se2 (CIGS) have a very high potential to reduce production costs for photovoltaic modules. The challenge is to combine the large area issues with high throughput and yield with the high quality of the device. ZSW has developed in-line processes for almost all process steps for glass/glass modules and reaches a 12.7% efficiency level with high yield for 30×30cm CIGS modules. A 30×30cm Cd-free module with nearly 10% efficiency is realised after a short time of development. The modules are very stable in the damp/heat test. These results qualify the process to start the next scaling up step. Würth Solar GmbH & Co. KG, a joint venture of ZSW, Würth group, and EnBW AG, was founded to commercialise CIGS technology and PV products. A cost estimation will be given, which considers the sensitivity of the relevant input parameters. With medium risk assumptions the manufacturing costs of CIGS modules for a 60MWp/a capacity are about 0.6Euro/Wp.
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