Construction of Solar Cell
A solar cell is basically made up of p-n junction diode. Solar cell principle layer is made up of anti-reflective cover glass because it protects semi-conductor materials against the sunlight. Solar Cell consists of small grid patterns with slight metallic strips are available under the glass. The top layer of solar cell is made using glass, metallic strips and anti-reflective coat. Solar cell consists of two semiconductor layers which are made up of p-type and n-type materials. A very thin layer of p-type semiconductor is grown on a relatively thicker n-type semiconductor. We need to apply few finer electrodes on the top of p-type semiconductor layer. So that these electrodes do not obstruct the light to reach the thin p-type layer. Just below the p-type layer there is a p-n junction. We need to provide a current collecting electrode at the bottom of the n-type layer. The base layer of this cell consist of two parts. A rear metallic electrode is beneath the p-type semiconductor and it works with the metallic grid to generate an electric current . A reflective layer is the last layer in this cell used to decrease the loss of light within the system. Solar cell top layer is covered with anti-reflective cover glass to prevent from any mechanical shocks.
Solar Cell
A Solar Cell is a device that converts light energy into electrical energy using the photovoltaic effect. A solar cell is also known as a photovoltaic cell(PV cell). A solar cell is made up of two types of semiconductors, one is called the p-type silicon layer and the n-type silicon layer. So Solar cell is a p-n junction diode.
The solar energy from the sun in the form of photons creates loose electrons on the n-type semiconductor and holes on the p-type semiconductor. These loose electrons are collected on the aluminum layer and start flowing thus resulting in an electric current.
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