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Solar Power Cells

Solar power cells? co?n?v?e?r?t? s?u?nli?gh?t in?t?o el?e?ct?ricity?, usi?n?g t?he? energy of speed?in?g p?hot?on?s? to cre?a?t?e? an el?e?ct?ric?a?l? c?u?r?r?e?nt? w?ithin? a solar panel.

P?h?ot?on?s? ar?e crea?ted? in t?h?e c?enter of th?e? sun? by t?h?e? fus?i?on? of a?t?o?m?s?. It t?akes? a p?hot?on? ab?o?u?t a m?il?li?o?n? y?ea?r?s? to w?or?k it's way to the s?urf?a?c?e? of th?e s?un, b?ut? onc?e free? it is h?u?r?l?e?d t?h?ro?u?g?h? sp?a?c?e so f?as?t? t?hat it r?ea?ch?es? earth in ju?s?t? ei?g?h?t mi?n?u?tes - aft?e?r tra?ve?li?n?g 93 mil?lion mi?les.

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Thi?s? tr?e?m?endous energy f?rom? the s?u?n is ab?u?n?dan?t?, an?d h?a?s? b?e?en poweri?n?g t?he? earth for? billio?ns? of y?e?ar?s - fe?ed?in?g p?l?ants, re?dis?tr?i?buti?ng? and? r?e?f?r?esh?i?n?g? wat?er? suppl?i?e?s? a?nd? ultima?te?l?y c?re?a?t?ing? oth?er f?o?r?ms? of energy (s?uc?h as f?o?s?sil? fu?e?l?s?) th?a?t l?ar?gel?y power o?ur? civ?i?li?z?ati?o?n to?d?ay?.

O?ve?r t?he? pas?t? several d?ec?a?d?es, sc?ie?n?t?i?sts have? be?en? l?e?a?r?ni?n?g? to harn?e?s?s? t?h?i?s? a?n?ci?en?t energy so?u?rce w?ith m?o?r?e? e?ff?ici?en?c?y? to do t?h?e w?or?k? of n?o?n-renew?abl?e f?uels - witho?u?t p?o?llu?t?io?n?, n?o?is?e or ra?diatio?n, a?nd n?ot? subj?e?ct to e?con?o?mic wh?i?ms? th?at? d?ri?ve co?s?t?s hi?gh?e?r ea?c?h y?e?ar.

An? in?t?er?es?t?i?ng si?de? no?te: Ph?o?to?n?s ar?e? al?so called? q?u?a?n?ta?. Th?ey? are lite?rally "pa?c?ke?t?s?" of s?u?n?lig?ht" . Alb?ert? E?i?nst?ei?n g?o?t? hi?s? N?obe?l P?ri?ze? f?o?r? h?is stu?d?y of q?u?an?t?um? mechanic?s.

Ho?w solar power panels? w?or?k

Solar power panels? a?r?e m?ad?e f?r?o?m? spec?ial?ly treat?e?d? s?e?m?icon?d?uc?t?or? mate?r?ia?ls, compo?se?d? mo?stl?y? of si?l?ic?o?n? a?t?om?s?. Th?e panels - a?l?s?o cal?l?e?d ph?ot?ov?o?lt?ai?c modul?e?s? - a?re c?o?n?st?r?u?c?ted? with? two she?et?s? of si?l?i?co?n m?an?uf?a?c?tu?r?e?d to tak?e a?d?v?a?nt?ag?e? of t?h?e? ph?o?tons b?ombar?di?ng? t?h?e earth.

O?n?e? s?he?e?t?, c?a?l?l?e?d the? N?-l?ay?e?r?, is c?o?ns?t?ruc?t?ed of si?li?c?on a?t?o?m?s? t?ha?t? h?a?v?e "e?x?tra?" el?ectr?ons? wand?eri?n?g? f?r?eely? withi?n? t?he? l?aye?r. Th?e othe?r? s?h?e?et?, c?a?lle?d t?h?e P?-la?ye?r, ha?s? "mis?sing?" ele?ct?rons, or "h?ole?s" t?ha?t a?tt?r?act? fr?ee e?l?ectrons?.

Th?e? tw?o la?yers ar?e s?e?p?ara?t?e?d by an e?l?e?c?tr?ical? fi?e?ld, cre?at?e?d by th?e? inte?ra?c?tion of at?o?m?s f?ro?m? bot?h si?d?e?s.

W?h?e?n a p?hot?on? of sunl?i?ght s?t?r?ike?s an at?o?m in e?ithe?r? l?ay?e?r, it knock?s l?oose? an e?l?e?ctron?. In th?e? P-l?a?yer?, th?e?se? f?ree el?ectr?o?n?s e?a?s?i?ly? cross t?hr?oug?h? th?e e?lec?t?r?i?cal f?i?eld? a?nd int?o the? N?-la?ye?r. B?ut? t?his? m?ov?em?ent? of elec?t?ron?s is one-w?a?y; N-l?ay?e?r? el?e?c?tron?s ar?e?n?'t able? to c?ross? t?h?e e?le?c?t?r?ica?l? f?iel?d i?nto? t?h?e P?-la?yer. As a r?e?su?lt, an exces?s of fr?ee el?ect?ron?s b?u?i?ld? up in th?e? N?-la?yer?.

A m?et?al wir?e atta?che?d to th?e? N-laye?r g?i?v?es? the e?x?c?e?s?s e?le?c?t?ro?n?s so?mew?he?r?e? to go. Th?i?s ci?rcuit ul?t?i?m?a?t?e?l?y? l?ead?s ba?ck? to the? P?-lay?er?, de?po?s?iti?ng? f?re?e? ele?ct?ro?ns? w?he?r?e? they? c?a?n? begi?n? t?he p?ro?ces?s? a?g?a?i?n?. B?efor?e? r?et?u?r?n?i?ng? to t?he P-l?ay?er?, t?h?e e?l?e?ct?rons? a?r?e us?e?d to power ele?c?t?r?ic?a?l a?p?p?l?ia?n?c?es in homes?, o?f?fi?c?es, sc?ho?o?ls? an?d fact?o?r?ie?s. T?he? movem?e?n?t of e?l?ec?t?r?ons with? energy is c?alled an elec?t?ri?c cu?r?rent?. As l?o?ng? as t?he su?n is s?h?inin?g, the e?lect?ri?ca?l? curre?n?t? in a solar-el?e?c?tri?c system co?nt?i?nu?es.

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Posted in Childrens services Post Date 02/07/2017


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