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dc.contributor.authorSheoran, Manav
dc.contributor.authorUpadhyaya, A. D.
dc.contributor.authorRounsaville, Brian
dc.contributor.authorKim, Dong Seop
dc.contributor.authorRohatgi, Ajeet
dc.contributor.authorNarayanan, S.
dc.date.accessioned2008-12-09T15:05:03Z
dc.date.available2008-12-09T15:05:03Z
dc.date.issued2006-05
dc.identifier.urihttp://hdl.handle.net/1853/25923
dc.descriptionPresented at the 4th World Conference on Photovoltaic Energy Conversion; Hawaii, USA; May 7-12, 2006.en
dc.description.abstractA low resistivity of 0.2-0.3 Ω.cm has been shown to be optimum for high quality single crystal silicon for solar cells. However, for lower quality cast mc-Si, this optimum resistivity increases owing to a dopant-defect interaction, which reduces the bulk lifetime at lower resistivities. In this study, solar cells fabricated on 225 μm thick cast multicrystalline silicon wafers showed very little or no enhancement in efficiency with the decrease in resistivity. However, Voc enhancement was observed for the lower resistivity cells despite significantly lower bulk lifetimes compared to higher resistivity cells. After gettering (during P diffusion) and hydrogenation (from SiNx) steps used in cell fabrication, the bulk lifetime in 225 μm thick wafers from the middle of the ingot decreased from 253 μs to 135 μs when the resistivity was lowered from 1.5 Ω.cm to 0.6 Ω.cm. This paper shows that solar cells fabricated on 175 μm thick, 1.5 Ω.cm, wafers showed no appreciable loss in the cell performance when compared to the 225 μm thick cells, consistent with PC1D modeling.en
dc.language.isoen_USen
dc.publisherGeorgia Institute of Technologyen
dc.subjectSolar cellsen
dc.subjectCrystal siliconen
dc.subjectMulticrystalline silicon wafersen
dc.titleInvestigation of the Effect of Resistivity and Thickness on the Performance of Cast Multicrystalline Silicon Solar Cellsen
dc.typeProceedingsen
dc.contributor.corporatenameGeorgia Institute of Technology. University Center of Excellence for Photovoltaic Research and Education
dc.contributor.corporatenameGeorgia Institute of Technology. School of Physics
dc.contributor.corporatenameBP Solar (Firm)


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