High Efficiency Screen-Printed Solar Cells on Textured Mono-Crystalline Silicon

dc.contributor.author Rohatgi, Ajeet
dc.contributor.author Ebong, Abasifreke
dc.contributor.author Hilali, Mohamed M.
dc.contributor.author Meemongkolkiat, Vichai
dc.contributor.author Rounsaville, Brian
dc.contributor.author Ristow, Alan
dc.contributor.corporatename Georgia Institute of Technology. University Center of Excellence for Photovoltaic Research and Education
dc.date.accessioned 2008-12-09T20:15:59Z
dc.date.available 2008-12-09T20:15:59Z
dc.date.issued 2005-10
dc.description Presented at the 15th International Photovoltaic Science and Engineering Conference, Shanghai, China; October 10-15, 2005. en
dc.description.abstract In this paper we report on high efficiency screen-printed 4 cm(2) solar cells fabricated on randomly textured float zone, magnetic Czochralski (MCz) and Ga-doped Cz silicon. A simple process involving POCl(3) emitters, low frequency PECVD silicon nitride deposition, Al back contact print, Ag front grid print followed by co-firing of the contacts produced efficiencies of 19.0% on textured float zone, 18.2% on MCz and 17.7% on Ga-doped Cz. A combination of high sheet resistance emitter (~100 Ω-/sq.) and the surface texturing resulted in short circuit current density of 37.3 mA/cm(2) for 0.6 Ω-cm float zone cell, 38.2 mA/cm(2) for 4.8 Ω-cm MCz cell and 37.4 mA/cm(2) for 1.5 Ω-cm Ga-doped Cz cell. Open circuit voltages were consistent with the base resistivity of the three materials. However, FF was highest for float zone (0.784) followed by MCz (0.759) and Ga-doped Cz (0.754). Model calculations performed using PC1D showed that, once the lifetime exceeds 200 μs for this cell design, the efficiency no longer has a strong dependence on the bulk lifetime. Instead, the performance is limited by the cell design including contacts, base resistivity, doping profiles, and front and back surface recombination velocities. Detailed analysis is performed to explain the high performance of these screen-printed cells and guidelines are provided for ≥20% efficient screen-printed cells. en
dc.identifier.uri http://hdl.handle.net/1853/25928
dc.language.iso en_US en
dc.publisher Georgia Institute of Technology en
dc.subject High efficiency silicon en
dc.subject High sheet resistance emitter en
dc.subject Solar cells en
dc.subject Screen-printed solar cells en
dc.title High Efficiency Screen-Printed Solar Cells on Textured Mono-Crystalline Silicon en
dc.type Text
dc.type.genre Proceedings
dspace.entity.type Publication
local.contributor.author Rohatgi, Ajeet
local.contributor.corporatename School of Electrical and Computer Engineering
local.contributor.corporatename College of Engineering
local.contributor.corporatename University Center of Excellence for Photovoltaics
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relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
relation.isOrgUnitOfPublication 93ace8d3-7479-459e-b63d-27aff6118464
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