The need for other means of supplying energy has led to the discovery of solar energy. Today, the search has been rewarded by the various brands of solar panels that have come into the market from different manufacturers. There is what is called Photovoltaics which is a process of generating electrical power through the conversion of solar radiation to a kind of electricity known as direct current electricity. This is done through the instrument of semi conductors. The semi conductors display the photovoltaic effect. The main tool used by photovoltaic to generate power is the photovoltaic solar panels.
Photovoltaic solar panels are composed of a good number of cells which contain some photovoltaic materials. Some of the materials used for photovoltaic solar panels include polycrystalline silicon, cadmium telluride, monocrystalline silicon, copper indium gallium selenide and amorphous silicon. Today, the demand for solar products has become very high which has led to a considerable number of inventions over the year. As at 2010, the capacity has grown to about 40,000 MW. Over one hundred countries make use of solar PV which makes it the reason for the high demand of the product. There are different ways of installing the product such as building it into the roof, building it into the ground or into the walls of a building.
Due to the high demand, manufacturers have gone into research on how to make photovoltaic solar panels better and as a result, a wide range of product based on technology and highly sophisticated concepts have come into the market. One thing to note is the difference between photoelectric effect and photovoltaic effect. Although, both processes are related to each other but they still have some point of differences. Electrons are usually ejected from the surface of a material when it is exposed to radiation of adequate energy in the case of photoelectric effect. But for photovoltaic effect, electrons that are generated are transferred within different bands usually from the valence to the conduction bands which results in the high build ups of voltage within two electrodes.
The radiation for most of the photovoltaic solar panel applications is the sunlight. This is why it is usually referred to as solar cells. It is also important to note that Alexandre Edmond Becquerel was the first person to observe photovoltaic in 1839. This effect has been known to be a source of producing electric power through the use of solar cells. The whole process continues to the converting of energy from the sun to a free flow of electrons. The effect can also be said to refer to photons of light electrifying electrons into a higher degree of energy. This gives way for them to operate as charge movers for the electric current. Photovoltaic solar panel implies the impartial working mode of photodiode where current passes through the device due to the trans-duced light energy. Direct current electricity is produced by solar cells from the sun light.
The production of photovoltaic has become very popular with an average of twenty percent increase every year since the year 2002. It has actually become the world’s fastest and biggest growing area of energy technology over the years. For instance, in 2006, various investors offered to install photovoltaic solar panels for free for a twenty five years contract to buy electricity at a preset cost or a power purchase agreement. This is because it was foreseen that by the end of 2009, more than ninety percent of photovoltaic, especially the commercial product, would be installed in the USA through the power purchase agreement. The future of this product is very bright and the possibility of being the final resort to solve the entire energy problem that is being faced in the world today.