Types of solar cells, structure, efficiency, price (part 1)

On the market today, there are 3 main types of solar cells. The following article PAT SOLAR will introduce in detail each type, structure as well as their performance.

There are three main types of solar cells: mono, poly and thin-film. Each type will be suitable for each needs, you should consider carefully when buying!


Solar battery structure

Silic is the material used to make solar cells, a semiconductor material that converts light into electricity.

Mono and poly solar cells

Mono and ploy both have photovoltaic cells (called solar cells) made from silicon wafers. To create a panel, silic plates as thin as 0.76 mm are assembled in rows and columns that form a rectangle. Then cover with glass and frame.


The only difference between the two is the silic content. Mono batteries are cut from a single pure silicon crystal. Poly is composed of pieces of silic crystal cut after fusion. Mono energy panels have black cells that are caused by light interacting with pure silic crystals. The poly battery has a greenish mottled color.


Thin-film energy battery

This type of solar cell, unlike the two above, is made of a variety of materials, the most common being the cadmium Telluride battery. A layer of CdTe is placed between transparent conductive layers to collect light and the battery also has a protective layer.

In addition, Thin-film batteries are composed of silicon, just like the two above types contain silicon. But it is not hard silicon, but undocrystalline silicon placed on glass, plastic or metal. Thin-film batteries are usually available in blue and black colors that are about 350 times thinner than the other two. This battery can be integrated into building materials to form solar tiles.


The efficiency of solar cells

Because the structure and composition are different, the generating efficiency of solar cells is different.

Mono and poly nlmt panels

Mono is the battery that has the most of the 3 in terms of conversion efficiency as well as capacity. Most of the conversion efficiency is around 20%, while poly sheets are usually 15% -19%.

Because of the better conversion efficiency, mono panels tend to produce more energy than poly and thin-film batteries. In terms of capacity, it can be more than 300W, one type can reach 450W while poly batteries have lower capacity.

Whereas both types are the same size, the former have 60 cells. Now more advanced technology should increase the number of cells up to 120 -144. Even if the number of cells is increased, the mono is also capable of producing more electricity.

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