Question

Describe how a silicon (single crystalline solar cell works. Explain the importance of the depletion layer in the charge separation process using a sketch. (3 marks)

Answer 1

The Basic component of a solar cell is pure Sition , which has been wed as an electrical component - Pure Coystalline Sition is a poor condutor of electricity as it is a lenicondentor material at ite In order to Oneriome this, silion in colar cell has impurities meaning that other atome are pumpefully mixed it with silon atonu in order to improve Lilian's ability to capture sende energy de connent it into electruty. - Mono Carystalline Solar cells are also called Single brystalline " cells are usually identified by their dauk black Colour & Mono Crystalline solar celle are made from a pure type of siluon which makes them the mat efficent Sition has some epercal propenties especially in its chystalline forum. - an atom has 14 electron arranged in 3 different Shells. The first 2 shells which hold ? and ? eletons The outer shell howener is only half full with just 4 elutron when the imperities are added it foums more Condentine , when the solar energy falli on Pucells, then the bond breaks down the free canners releases and like this solar energy is connected to electrical energy

6e D @ + + + + + + + pet Pepletion layer, and holes depletes the the electrons in the n he holes in region combining of electrous the p- region and near the juntion * Repuleine force due to there negetine ious mall prenent there electrons from further duffining into p type material & This leads to change reparation .