They're flexible but rarely used for residential projects. Thin film (or amorphous silicon) cells can be the cheapest but also the least efficient.This makes the panels even more efficient, but they cost more. Hybrid cells combine crystalline cells with thin film cells.They’re cheaper but can be less efficient. They look blue and speckled and contain many crystals in each cell. Polycrystalline panels are made by melting raw silicon together to make wafers – a faster and cheaper process than monocrystalline panels.They have the highest purity of silicon making them efficient, with a higher power output than polycrystalline panels. Monocrystalline solar panels are made of silicon formed into bars and cut into wafers.PV panels differ in efficiency – how much of the sun's energy is used by the system per unit area – and in price. All are made from silicon but differ in the way the material is cut and treated. There are four basic types of PV panel: monocrystalline, polycrystalline (or multicrystalline), hybrid and thin film (or amorphous silicon). When exposed to daylight, the semi-conducting material becomes 'energised' and this produces electricity. Solar panels are made of a thin layer of semi-conducting material sandwiched between a sheet of glass and a polymer resin.
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