Crystalline Modules

Currently, crystalline solar modules, with approximately 80%, make up the bulk of the solar cells used for solar modules.

There are 2 types of crystalline solar modules: monocrystalline and polycrystalline modules.

Polycrystalline modules:

The raw material silicon is melted and poured into square blocks. The resulting discs, also called wafers, are cleaned in a chemical bath and then doped in phosphorus.

These silicon blocks are then cut into wafer-thin slices with wire saws. The efficiency varies from 14% -20%.

Monocrystalline modules:

Monocrystalline means "single crystal". A seed crystal is dipped into the silicon that is heated to approximately 1420°C and pulled out to the top while rotating. As with the polycrystalline blocks, the round ingots are now first swan into a semi-quadratic form and subsequently into wafers of about 0.3 mm thickness. The efficiency grade of monocrystalline cells lies at approximately 15-21%.