Charging station solar monocrystalline silicon wafer

How a silicon wafer is a solar cell?

Front and Back Contact Formation Technically, a silicon wafer is a solar cell when the p–n junction is formed, but it only becomes functional after metallisation. The metal contacts play a key role in the production of highly efficient and cost-effective crystalline Si PV cells.

What is a monocrystalline silicon wafer?

Monocrystalline silicon is composed of silicon atoms in an extended orderly arrangement, with no grain boundaries or hard spots; hence the monocrystalline wafer is suited to the diamond wire sawing technique. Diamond wire saw technology has therefore become a perfectly matched option for mono wafer slicing, and significantly reduces costs.

What is a mono silicon wafer?

With advanced pulling technology, mono silicon wafers can be produced with a low oxygen concentration and a long minority carrier lifetime, both of which are essential for excellent wafer performance.

What type of wafer does a cell use?

The cells usually use a crystalline silicon (c-Si) wafer, with monocrystalline silicon being favoured due to its higher efficiency. An anti-reflective and passivation layer, often made of silicon dioxide, is applied to one side of the c-Si wafer to further improve light absorption and reduce losses.

How efficient are monocrystalline solar cells?

Compared with multicrystalline solar cells, monocrystalline solar cells are demonstrating increasingly outstanding efficiencies: for example, Kaneka announced that its new HJ-IBC solar cell achieved an efficiency of 26.3%, which is a record-breaking efficiency for a Si solar cell .

What is the emissivity of a non-encapsulated c-Si solar cell?

The emissivity of the non-encapsulated c-Si solar cell was determined to be 75% in the MIR range, and the emission of free charge carriers dominates in the highly doped emitter and back surface layers of the array. Both effects are enhanced by the improved optical connectivity resulting from the texture of the front surface.