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Rohatgi, Ajeet

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Author: Gabor, A. M. × Author: Jeong, Ji-Weon × Author: Kim, Dong Seop × Author: Yelundur, Vijay × End date: 2009 × Start date: 2000 × search.filters.applied.f.isOrgUnitOfPublicationTitle: School of Electrical and Computer Engineering × search.filters.applied.f.isOrgUnitOfPublicationTitle: University Center of Excellence for Photovoltaics ×

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    Implementation of Rapid Thermal Processing to Achieve Greater Than 15% Efficient Screen-Printed Ribbon Silicon Solar Cells
    (Georgia Institute of Technology, 2003-05) Rohatgi, Ajeet ; Yelundur, Vijay ; Jeong, Ji-Weon ; Kim, Dong Seop ; Gabor, A. M.
    This paper summarizes our progress in fabricating record-high efficiency ribbon Si solar cells with screen-printed and photolithography defined contacts. We have developed and optimized rapid thermal processing enhanced SiN(x)-induced hydrogenation to achieve record-high efficiency screen-printed EFG (15.9%) and String Ribbon (15.6%) cells and a high-efficiency String Ribbon cell (17.8%) with photolithography defined contacts. A low-frequency SiN(x) film and a two-step RTP firing process were critical in achieving high-efficiency screenprinted cells. Step 1 provides SiN(x) induced hydrogenation and forms an aluminum doped back surface field. Step 2 is designed for Ag grid firing and includes rapid cooling to retain hydrogen introduced in Step 1.