solar-cell-太阳能电池介绍

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1、SolarCell(Photovoltaics)발표자:20075418JuDae-HyunSolarCell(PV)LightElectricityNonrenewableEnargy재생에너지원(RenewableEnergy)일회용에너지원(NonrenewableEnergy)RenewableWhatisaSolarCell?AstructurethatconvertssolarenergydirectlytoDCelectricenergy.Itsuppliesavoltageandacurrenttoaresistiveload(light,bat

2、tery,motor).Power=CurrentxVoltage=Current2xR=Voltage2/RItislikeabatterybecauseitsuppliesDCpower.Itisnotlikeabatterybecausethevoltagesuppliedbythecellchangeswithchangesintheresistanceoftheload.BasicPhysicsofSolarCellsSilicon(Si)isfromgroup4oftheperiodtable.WhenmanySiatomsareinclosepro

3、ximity,theenergystatesformbandsofforbiddenenergystates.Oneofthesebandsiscalledthebandgap(Eg)andtheabsorptionoflightinSiisastrongfunctionofEg.TheSundailyprovidesabout10000timesmoreenergytotheEarththanweconsumePhotovoltaictechnologydirectlyconvertssolarenergyintoelectricityNomovingpart

4、s–nonoise–noemissions–longlifetimeLargeindustrialpotential-costreductionsneededFeedstockforPVindustryissilicon-thesecondmostabundantelementinthecrustoftheEarthTheSunasEnergySourceSolarEnergystatusMarketisexplodingThesolarindustryisveryprofitableLackofhighlypurifiedsilicon(polysilicon

5、)Costofsolarelectricityistoohigh,R&DfocusonreducingcostandincreasingefficiencyActualGrowthvs.HistoricForecastsActualmarketdevelopmentSolarEnergystatusMarketisexplodingThesolarindustryisveryprofitableLackofhighlypurifiedsilicon(polysilicon)Costofsolarelectricityistoohigh,R&Dfocusonred

6、ucingcostandincreasingefficiency1594358571705245402004006008001000120014001600180020012002200320042005(MNOK)-GrossrevenuedevelopmentSolarEnergystatusMarketisexplodingThesolarindustryisveryprofitableLackofhighlypurifiedsilicon(polysilicon)Costofsolarelectricityistoohigh,R&Dfocusonredu

7、cingcostandincreasingefficiencySolarGradeSiliconSupply-Demand(MT/year)SolarEnergystatusMarketisexplodingThesolarindustryisveryprofitableLackofhighlypurifiedsilicon(polysilicon)Costofsolarelectricityistoohigh,R&DfocusonreducingcostandincreasingefficiencyCostreductions–existingtechnolo

8、giesThinnerw