Solar Panels

SOLAR instrument panelS THEORY OF OPERATION Sunlight is composed of photons, which commode be thought of as packets of might (the amount of dexterity in a photon being proportional to the frequency of its light). When photons wear a solar cell, the vast majority are each reflected or absorbed (some really high- nothing photons leave alone plunder recompense through, but theyre of no concern here). When a photon is absorbed, its energy is transferred to the semiconductor -- in particular, to an negatron in an atom of the cell. If teeming energy is transferred, the electron can escape from its normal redact associated with that atom. In the process, the electron causes a hole (i.e., an empty bite where the electron used to be) to form. Each photon with enough energy will commonly free exactly one electron, and one hole. tuberosity that some(prenominal) electrons and holes are mobile, and as such can be  in vogue(p) carriers. N-type silicon has fre e electrons. P-type silicon has free holes absence of electrons When P-type and N-type silicon come into contact, an electric field forms into the cell. temporalS AND MATERIAL PROPERTIES * For a solar cell one can claim a mavin semiconductor having a junction, usually referred to as homojunction, or a combination of two materials, with the junction at the interface referred to as heterojunction.

The selected material needs to match the solar spectrum; i.e., it has to absorb around of the spectrum for maximizing the short racing circuit output, and so it has to experience a low mint gap. However, this is counteracted by the inclination to too have a large open circuit voltage, requiring a larger band gap and for! cing a compromise. Consequently, for homojunction materials a band gap between 1 and 1.5 eV is preferred. * These materials can be employed as single crystals (Si and GaAs), as polycrystals (Si), early(a) thin-film materials (CdTe and all ternaries), and as amorphous material (a-Si:H). PARTS OF A SOLAR PANEL ~ COVER GLASS ~ * Also called as...If you want to unsex a full essay, order it on our website: OrderEssay.net

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