Abstract
AbstractThere are several laser‐based processes which are currently used in solar cell manufacturing or show a high potential for being implemented in series production in the future. Among these are laser edge isolation, laser fired contacts, metal/emitter wrap through, laser doping as well as P1, P2 and P3 structuring of thin film solar cells. Currently, all these direct‐patterning processes are mostly performed by single‐mode lasers with Gaussian intensity distributions. In contrast, top hat profiles offer larger process stability as well as cost savings. Another process that is still in the research and development stage is the crystallization of amorphous Si into polycrystalline Si. Here an increase of the electron mobility results in a better separation of the charge carriers in the cell and finally increased cell efficiency. A novel diode laser line scanning system and first processing results are presented in this article.
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