PLASMA-ASSISTED CARBON NANOTUBE FOR SOLAR CELL APPLICATION

Abstract

Solar cells, also known as photovoltaic cells, convert sunlight into electric current from photovoltaic effect. The principle of solar cells involves the birth of an electric current when certain materials are exposed to light.

Solar cell works upon Photovoltaic effect can be say it is little bit similar to photoelectric effect. In photovoltaic effect when incident Light falls on material then free electrons of that metal start moving within the material while in Photoelectric electron left the metal surface completely this effect is called Photovoltaic effect. 1.1.2 Construction of Solar Cell It consists of a P-N Junction Diode in which N region has small thickness 0.3 micrometre and P region has large thickness 300 micrometre. N region is made thin so that light falling on the solar cell is not absorbed significantly before reaching the junction. On the top of silicon layer metallic fingers are deposited. This is called Front contact. The bottom of P type silicon layer is coated with metal(copper) this is called back contact.