The Solar Of Solar Cell

1648 WordsNov 11, 20157 Pages
A solar cell is a device which produces electricity through the conversion of light energy, through the photovoltaic effect. The photovoltaic effect is a chemical and physical phenomenon, and relates to the creation of electrical current within a material when it is exposed to light. Solar cells are considered to be photovoltaic, despite whether the source of light is produced artificially, or is from the sun. History of a Solar Cell It was in 1839 when the photovoltaic effect was first discovered, by Alexandre Edmond Becquerel, a French physicist. His experiment involved illuminating, using a couple of different types of light, two electrodes. Light sensitive materials, AgCl or AgBr, coated the electrodes, and the experiment was undertaken inside a black box which was surrounded by a solution of acid. When the intensity of the light increased, so did the electricity output. Originally, despite extended research, photovoltaic electricity was very inefficient and the main purpose of solar cells during this period was to measure light. In 1905, Albert Einstein claimed that light contained quanta of energy, which we refer to as photons today. He suggested that the energy only varies with its frequency. Although a simple theory, it was considered to be revolutionary at the time, and explained how the frequency of the light affected the absorption of the photons. It was in 1941 when Russell Ohl invented the solar cell. In 1954, three researches at Bell Laboratories named

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