9 Sustainable Attainment of Solar E-waste …
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unit thus created is called the solar module. SPV module is mainly used for
charging batteries. Thus 36 cells are usually joined in series to form a regular
module capable of charging 12 V battery. A terminal box for external connections
is installed on the rear side of the board. A photovoltaic system’s basic building
block is the solar cell, a semiconductor device which has a simple p-n junction and
produces DC electricity when exposed to sunlight. The solar cell is made of “SemiConducor” materials that are processed to make the photovoltaic system. The solarcell is made of silicon single crystal, polycrystalline, and silicon amorphous with an
area of a few sq. centimeters to 200 cm
2 and even more (Figs. 9.2 and 9.3).
“The effect of photovoltaic (PV) is the basis for transforming light into electricity
in photovoltaic, or solar, cells. It is therefore common for PV modules to be classified
basically by the form of light-absorbing materials used. In addition, the categorization
of PV modules by manufacturing technologies is rational. The Silicon wafer based
PV module is the most common type of solar cell produced worldwide. This was
also the dominant one for delivering power modules into photovoltaic applications.
The commercially available multicrystalline silicon solar cells are about 14–19%
effective” [16].
All the components and materials of PV module are described in Tables 9.1 and
9.2.
“Solar panels use toxic materials including lead and polymers, and compounds.
If discarded in an unregulated manner, the possible end-of - life disposal of such
Fig. 9.2 Components of photovoltaic module
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