THIN-FILM PHOTOVOLTAICS
The field of solar power generation has undergone an impressive transformation in recent years. In the production of thin-film solar modules, which are largely based on glass substrates, 4JET plays a crucial role. We are working to continuously increase the efficiency of PV modules and, in the same course, to further reduce production costs.
OPTIMIZATION OF SOLAR CELLS
In the production of thin-film cells, precise electrical isolation through high-precision and selective laser structuring is the key to efficient PV modules. We develop and supply state-of-the-art laser technologies that are capable of accomplishing this task with maximum efficiency.
SHORT CYCLE TIMES AND UNMATCHED FLEXIBILITY
Our many years of experience and our advanced systems enable us to process thin-film modules from both the glass and the layer side in a highly productive manner. Depending on the application, our systems are equipped with highly accurate and fast scanning processes, or have a variety of flying optics. This not only achieves very short cycle times, but also unprecedented flexibility in the production of high-efficiency PV modules. LASER SCRIBING
Laser scribing is an enabling technology for manufacturing thin-film solar modules. It separates the thin-film module in thin stripes of cells to achieve a high voltage at a low current. Through alternating coating and scribing steps the so called monolithic interconnection is achieved. Laser scribing usually comprises the front electrode, absorber and back electrode structuring by means of narrow isolation groves with a width well below 50 µm. LASER SCRIBING
EFFICIENT PROCESSING FOR HIGH PERFORMANCE PV MODULES
Our laser scribing technology offers a variety of scribe processes to meet your requirements. We realize both layer-side and substrate-side processing, reducing the dead zone to a minimum. Even in case of inaccuracies in the glass, we ensure full compensation and thus perfect scribing results on the entire module. With an actively controlled and therefore unmatched uniform distribution of laser power to all beams, we achieve identical scribing results on the entire module, even over long periods of time in industrial mass production. This is an important building block in the production of efficient PV modules that reliably provide you with clean energy. Learn more about our innovative laser technology and how it can increase the efficiency of your modules.
CLEAN AND UNDAMAGED GLASS SURFACE USING LASER EDGE DELETION (LED) PROCESS FROM 4JET
Identical results for all Scribe lines for higher production yields
Individual, automatic adjustment of laser power for each beam
Elimination of fade outs due to focus deviations
Full compensation of glass distortion
Elimination of shunts due to focus inaccuracies
Improvement of overall scribe quality
Homogeneous scribe results across the entire substrate
Increased production yield
Higher module efficiency
Lower maintenance requirements and thus higher machine uptime
