The goal is to provide a process for the scribing of the molybdenum layer (P1), without changing the underlying insulating layer and to enable structuring of CIGS (P2) parallel to (P1) without affecting the molybdenum layer. This allows parallel removal of transparent conducting oxides (TCO) (P3) without sacrificing other layers. The three scribes are characterised by a depth of less than 50 µm at a processing speed of 2 m/s.
Multitel will assess the use of new pulsed lasers, combining performance and low investment cost to gain expertise on the integration of such lasers into fully controlled machines for solar cell production. In addition to that, Lasea focuses on demonstrating the feasibility of using the new laser sources for thin film solar cell production. The benefits include:
- Provide the end user SSE a set of objectives for photovoltaic scribing.
- Increase the photovoltaic conversion efficiency of modules produced in fully-automated in-line machines to minimise the amount of scribing.
- Reduce the distance between the modules and the amount of damage caused by the heat affected zones on the edges of the grooves.
- Increase the reproducibility of the laser structuring compared to the cuts made by mechanical or chemical methods.
- Enhance the productivity of the manufacturing system by running at speeds of 5-6 m/s.