Mcghee Investor Presentation

Simple Cell Technologies continue to improve - 19.6% efficient planar cells on CZ silicon Source: J-H Lai, IEEE PVSC, June 2011 National Renewable Energy Laboratory Ag (screen-printed, fired) SIN (PECVD) SiO2 (thin, thermally- grown) n* (P)-Si (ion implantation) p(B)-Si (starting wafer) SiO2 (thin, thermally- grown) SIN (PECVD) X Al-Si Eutectic (screen- printed, alloyed) p* (AI)-Si (LPE during alloying) Innovation for Our Energy Future

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