Laser technology is outstandingly suited for microstructuring crystalline solar cells. It enables a high throughput and can be reliably integrated into production lines. It is economical and high-throughput relative to other methods such as masking or electron beam processes. Additional advantages are non-contact energy coupling, flexible beam guidance, high accuracy, and rapid positioning as well as the exact control of energy infeed. Material damage is avoided.
Different laser sources ranging from nanosecond lasers to ultra-short pulse lasers in combination with scanner systems are possible to use depending on customer requirements concerning quality, throughput, and investment costs.
Nanosecond lasers score points mainly in terms of throughput and cost efficiency. However, due to pulse duration, relatively more heat is conveyed into the material than with ultra-short pulse lasers.