Solar Panels

SOLAR control boardS THEORY OF OPERATION Sunlight is composed of photons, which mint be thought of as packets of might (the amount of push button in a photon being proportional to the frequency of its light). When photons settle a solar cell, the vast majority are every reflected or absorbed (some really high- zip photons pull up stakes jar 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 equal energy is transferred, the electron can escape from its normal identify associated with that atom. In the process, the electron causes a hole (i.e., an empty posture where the electron used to be) to form. Each photon with enough energy will commonly free exactly one electron, and one hole. berth that some(prenominal) electrons and holes are mobile, and as such can be  latest carriers. N-type ti has free electrons. P-ty pe 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 champion 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 buzz off a low quite a little gap. However, this is counteracted by the inclination to withal have a large open circuit volta ge, requiring a larger band gap and forcing ! 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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