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Insights Concerning Photovoltaic Solar Panel Technology
There are 3 primary types of construction of PV panels. All those described here utilize silicon.

Mono Crystalline cells are cut from a single crystal of silicon- they are effectively a slice from a crystal. In appearance, it has a gentle texture and you will be able to notice the thickness of the slice. These are the most effective and the priciest to make.

Polycrystalline (or Multi Crystalline) cells are effectively a slice cut from a block of silicon, consisting of a large number of crystals. They have got a speckled reflective physical appearance and again you can see the thickness of the slice.

Amorphous cells are produced by putting a thin film of amorphous (non crystalline) silicon onto a wide choice of areas. These are the least photovoltaic efficiency and least expensive to produce of the three types. Due to the amorphous nature of the thin layer, it is flexible, and if produced on a flexible surface, the whole solar panel can be elastic.

Based on the chief idea that a solar cell getting more light energy will create a lot more electricity, concentrating photovoltaic solar panels simply involve a method (typically using a lens or mirrors) to focus more sunlight onto a photovoltaic cell. As fewer cells are then necessary for the same area of panel (or light capturing area) it might then become economical to utilize an extremely efficient multi junction cell.

Potentially, this type of panel has the following positive aspects:

- It has a higher overall proficiency, capturing more solar energy per meter squared contributing to a smaller area of panels needed for a particular output. Resulting effectiveness levels can approach 50%.

- Possibly lower cost per watt of output due to lower number of solar cells required, while the material cost and manufacturing process of the optics (light concentration mechanism) is comparatively inexpensive.

- Lower utilization of environmentally unfriendly chemicals involved in the panel manufacturing process as a result of lower number of pv cells.

- Where the focus is such that cooling of the photovoltaic module is needed, a panel may have the capability to output heat at the same time as electricity.

However, there are drawbacks:

- In all but the lower levels of concentration, heat must be dissipated from the cells. Cooling is needed as cell efficiency is significantly reduced at higher temperatures, or in intense situations, cells may be damaged.

- In all but the lesser levels of concentration a tracker system will be needed to keep the concentrated light focused on the cells.

- As diffuse light cannot be effectively concentrated, concentrating PV panels are best suited to areas with a high level of clear sunshine.

Though research has continued on focusing photovoltaic efficiency for many years, they have not made their mark on the industry, and exactly where they have been used, it has been in big scale projects. CPV panels that have been manufactured have come in "various shapes and sizes" with no definite design leading the field.

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