JENOPTIK: new laser material processing system for wafer-based solar cells

With the development of the JENOPTIK-VOTAN Solas 1800 Jenoptik is expanding its activities in the photovoltaic market, combining laser technology know-how in all aspects of the JenLas disk IR50 disk l…

With the development of the JENOPTIK-VOTAN Solas 1800 Jenoptik is expanding its activities in the photovoltaic market, combining laser technology know-how in all aspects of the JenLas disk IR50 disk laser with complex system technology. Based on its expertise along the entire added value chain-from laser process through to finished production facility for a wide range of laser material processing tasks-the Jenoptik Lasers & Material Processing division developed a laser processing machine for drilling minute through holes in wafers for solar cells. One of the crucial factors in the photovoltaic industry is the so-called grid parity, a comparison of costs of generating electricity via solar energy via conventional methods. Achieving grid parity requires either an increased level of efficiency or a reduction in the production costs. The JENOPTIK-VOTAN Solas 1800 laser system can have a positive influence on both factors. The electrical efficiency of the cells can be increased through the use of Metal Wrap Through (MWT) or Emitter Wrap Through (EWT) technology. In order to increase the active surface area of the cells, in the case of both technologies the contacts are laid from the front to the rear side of the cell. The contact finger that are currently used as standard and covers parts of the active surface area can therefore be dispensed. The JENOPTIK-VOTAN Solas 1800 will be offered in two versions, a stand-alone system for the development of new products and processes and a technology module for integration into the existing in-line production system.