Silicon Solar Cell Technologies

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Solarcelltechnologies FirstGenerationSolarcells Siliconwaferbasedsolarcelltechnologies (300to350m)

SecondGenerationSolarcells Thinfilmbasedsolarcelltechnologies CdTe,CuInS2 andamorphousSilicon(5to10m)

ThirdGenerationSolarcells Organicandnanostructured basedsolarcell technologies

ProductionofSilicon Mostwidelyusedsemiconductormaterialforsolarcell applications. 90%ofworldssolarphotovoltaicmodulesareproducedinSi wafers. 1975,worldwidePVmoduleproductionwasabout2MWp 2007,ithasgrownto3000MWp Earlier,itwasusingelectronicgradsilicon Now,PVindustryislookingforsolargradesilicon

Various routes for making solar cells from silicon material

ProductionofMetallurgicalgradeSilicon(MGS) Arcfurnace

98%pureSiliconEnergyconsumedintheprocessisquitehigh Itisintherangeof13to15kWh/Kg Outofthis5%onlywillbeusedformakingelectronicgradesilicon

Typicalimpurityconcentrations inmetallurgicalgradesiliconElementConcentration (particlespermillion)aluminum boron calcium chromium copper iron magnesium 10004350 4060 245500 50200 1545 15506500 1050 manganese 50120

molybdenum