Solar photovoltaic panel laser welding

How a solar cell is laser welded?

A glass plate is mounted on top of the foil to keep the aluminum foil flat during the laser welding process, and the laser beam is passed through the plate. The solar cell interconnection is achieved by the Al foil contacting the rear side which is laser welded to the Ag screen-printed front side metallization of the next cell.

How is laser welding used for metallization and interconnection of solar cells?

Laser welding is used for the metallization and interconnection of solar cells. Figure 21 (Schulte-Huxel et al. 2016) shows the interconnection of two cells using laser welding of Al foil. A glass plate is mounted on top of the foil to keep the aluminum foil flat during the laser welding process, and the laser beam is passed through the plate.

Can femtosecond lasers form glass-to-glass welds for polymer-free solar modules?

The result is a module design that is completely polymer free, hermetically sealed, has improved thermal properties, and is easily recycled. This article explores the use of femtosecond (fs) lasers to form glass-to-glass welds for hermetically sealed, polymer-free solar modules.

Can laser processing systems be used for photovoltaic applications?

The laser processing systems for photovoltaic applications have advanced such that commercial systems are available. These commercial systems can provide multifunctional capabilities such that ohmic contact formation, dopant activation, and other steps that can be carried out using the same machine.

What are the applications of high-power laser processing for photovoltaic devices?

The various applications of high-power laser processing for photovoltaic devices have been discussed, but lasers also play an important role in medical device manufacturing for cutting, marking, and drilling applications.

Can laser drilling be used for solar cell devices?

Laser drilling has also been used for solar cell devices, as shown in Fig. 19 (Gupta and Carlson 2015 ). Small holes allow the emitter current generated in the front of the cell to be transferred to the back of the cell for bus bar connections. Silicon solar cell device with laser formed buried contacts. (Reproduced from Bruton et al. 2003)