Mono crystalline solar cells are the earliest form of solar cells. With the growing demand of energy in the world, the concept of renewable energy has attracted the attention of not only the scientists and researchers but also the consumers and common people.
How are mono crystalline solar cells formed?
There are several steps involved in their production and formation. But the basic outline of the procedure involves the following steps.
- Cylindrical ingots of silicon are used for the preparation of these solar cells.
- Ingots are long rectangular or oblong blocks of silicon.
- Thin wafers are cut out of these oblong blocks of silicon.
- The process of sawing is used the most frequently for cutting of the wafers.
- Great care has to be taken since the wafers are extremely thin and the dimensions have to be very accurate.
- Another important thing which is required is a rigid glass substrate.
- The wafers of silicon are then deposited on the glass substrate.
Appearance of Mono crystalline Solar cells
These cells appear to be polka dotted. They have gaps at all corners of the cell this shape gives them a unique appearance. Among all kinds of solar cells, these cells are the most easy to recognize.
This shape is owing to the fact that oblong blocks are used in making c-Si solar cells. Due to this shape, square solar cells are not completely filled and the corners remain empty giving them this certain look.
Wastage of material and space in Mono crystalline Solar cells
These cells have a great disadvantage that they are wasteful of material. This defect is inherent in their production and is very difficult to minimize. The manufacturers have to compromise between the wastage of material or the wastage of the space.
Cost of Mono crystalline Solar cells
Another disadvantage is the cost of these cells. These cells are rather expensive. Their price, sometimes makes them out of the access of a common consumer.
Efficiency of Mono crystalline Solar cells
These cells are expensive but have very good conversion efficiency. That is why they are perfectly suitable for commercial usage. Conversion efficiency means how much of the solar energy captured by the cells is converted into electrical energy. It also measures the amount and rate of absorption of solar spectrum. Mono crystalline solar cells can show about 20% efficiency.
Contenders of Mono crystalline Solar cells
With new and emerging technologies, we see new things every other day in the market, which are of course much better than the existing ones. Mono crystalline silicon solar cells have some very big disadvantages like wastefulness and the high cost. Several other technologies are taking their place in the market.
Polycrystalline solar cells are the most important ones which are free of all these defects. They are less efficient but the reduced price makes them attractive for both the manufacturers and consumers.