Jenoptik to Introduce Further Developed Infrared Disk Lasers for Crystalline Photovoltaic Elements at the 26th EU PVSEC.

Jenoptiks’ Lasers & Material Processing division presents its novelty in the field of laser sources for solar cell processing at the leading European trade fair of the photovoltaic industry – the 26th European Photovoltaic Solar Energy Conference and Exhibition – in Hamburg, Germany, exhibition hall A1, stand B9, from September 5th to 8th, 2011.

Jenoptiks’ infrared disk laser with independently adjustable laser parameters for the photovoltaics

With the consequent further development of the already introduced and proven infrared disk lasers of the JenLas® disk family, Jenoptik now adds the new laser sources JenLas® disk IR50E and JenLas® disk IR70E with optimized, independently adjustable laser parameters for the photovoltaics sector to that product range.

Those E-version lasers (E = extended) achieve shorter pulse lengths, significantly higher repetition rates, and constantly high pulse energies. Another advantage for the user is the flexible adjustment of optimum process parameters. That means the pulse lengths of the lasers can be adjusted independently of repetition rate and laser power. Moreover, the lasers come with a high degree of intrinsic safety thanks to an intelligent laser control system. Standardized interfaces for easy integration and high control flexibility (analog, digital, software) were also an important aspect and have been realized accordingly.

Also to be noted and especially important: The new JenLas® disk IRxxE lasers particularly meet the requirements of the new technologies in the photovoltaics industry such as laser fired contacts (LFC – up to 25,000 contacts per second). The LFC process is an alternative technology for solar cell
backside contacting, resulting in an increase in the electrical efficiency of the cells. This is done by locally melting (“firing”) of the metallization via laser, passing through the passivation layer, all the way through to the contacting layer. Further lasing processes that can be realized are metal wrap through (MWT) and emitter wrap through (EWT) as well as laser edge isolation (LEI).

With a laser power of 45 W, a pulse energy of up to 4.5 mJ, and repetition rates of up to 300 kHz, the new JenLas® disk IR50E is capable of covering a broad spectrum of applications within the infrared wavelength range of 1,030 nm. The same applies to the more powerful version - the JenLas® disk IR70E - with a laser power of 65 W and pulse energy of up to 6.5 mJ and the same repetition rates and wavelength.

Femtosecond laser for optimal use in the photovoltaic industry

The new JenLas D2.fs ® is a new product in Jenoptiks’ laser series. Based on the disc laser technology, the laser guarantees an outstanding parameter stability and sets a new standard for laser sources of the femtosecond group.

The laser emits high-pulse-energies of up to 40 μJ and can be operated with up to 4W output power in the range of 30-200 kHz. The beam quality of M² ≤ 1.25 coupled with the pulse duration of ≤ 400 fs allows innovative industrial laser applications in photovoltaics. To be mentioned is a selective single layer removal in processing of multi-layer systems composed of a variety of materials. The concrete industrial application is the removal of dielectric layers on crystalline solar cells.

An advantage for the user of the femtosecond laser is the nondestructive removal of the layers, because no laser heat input will be transferred onto the crystalline silicon solar cell.

For industrial use the working temperature range of the laser beam source was extended to 15-35° C. In order to ensure the industrial suitability, each laser goes through a strict type checking, in which the safe functioning under typical transportation, storage and operating conditions will be proven, which also include climate and shock tests, resistance to the presence of external electrical interferences and compliance with EMC standards concerning transmission of electrical emissions. Much attention was paid to an easy integration of the turn-key lasers into complex machines and systems. For example, each drive signal can be controlled either by software or hardware.

About the Jenoptik Lasers & Material Processing division

The Lasers & Material Processing division has control of the entire value-added chain of laser material processing and it is one of the leading providers – from component through to complete system. In the area of laser, Jenoptik has specialized in high-quality semiconductor materials and reliable diode lasers as well as innovative solid-state lasers, for example disk and fiber lasers. In the area of high-power diode lasers Jenoptik is acknowledged worldwide as a leader in quality for high-power diode lasers. In the area of laser processing systems we develop systems that are integrated into production facilities for our customers as part of their process optimization and automation. These systems enable our customers to work with plastics, metals, semiconductor materials and solar cells, both in thin-film as well as wafer technology, with maximum efficiency, precision and safety.

Taisia Vlasova
Marketing & Communication
Lasers & Material Processing

JENOPTIK I Lasers & Material Processing
JENOPTIK Laser GmbH
Goeschwitzer Strasse 29
07745 Jena I Germany
Phone: +49 3641 65-4331 I Fax -4011
Email: taisia.vlasova@jenoptik.com

This release was published on openPR.