Photovoltaic Cells and Its Uses

Introduction

Photovoltaic effect is that the process where the sunlight energy gets converted to the
electrical energy through a semi-conductor medium.It's this effect that produces solar panels
useful, because it is how the cells within the panel convert sunlight to voltage. it absolutely
was first discovered in 1839 by Edmond Becquerel. When doing experiments involving wet
cells, he noted that the voltage of the cell increased when its silver plates were exposed to the
daylight.

Now this process is sort of huge yet as complexed when it involves this effect. The
semiconductor unit product of P-type (positive charge) and N-type (negative charge)
materials. When light from the sun strikes N-type material, it creates free electrons that are
pushed towards P-type material creating a voltage difference which ends up in current
generation. The present generated is electrical energy which can'tt be used for house lighting.
Hence, an inverter is employed to convert that electrical energy into electricity which then will be utilized for general use.

Besides the direct excitation of free electrons, a photovoltaic effect also can arise simply
because of the heating caused by absorption of the sunlight energy. The heating results in
increased temperature of the semiconductor material, which is in the midst of temperature
gradients. These thermal gradients successively may generate a voltage through the Seebeck
effect. Whether direct excitation or thermal effects dominate the photovoltaic effect will rely
upon many material parameters.

Uses of PV Cells

The use of photovoltaic cells to provide power is an emerging technology that contains a very
bright future. As home owners and business round the world make attempts to save lots of
money and reduce operating costs, solar power is becoming a more frequent choice. Solar
photovoltaic energy cells are the most power source behind all solar systems, these cells first
got their start in calculators. When light strikes this material the semiconductor starts to
maneuver the electrons within the solar panels. The resulting electron activity is so strong
that because the electrons flow round the semiconductor electricity begins to be produced
within the solar battery.

The important point in using photovoltaic system is that it will be used anywhere where
sunlight is on the market and also the system needn't be connected to the grid ( off grid), so
this method will be useful in power remote areas where there is power supply shortage or
power cut from the government’s side or due to some natural circumstances.