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High efficiency, low cost buried contact silicon solar cells

: Honsberg, C.B.; Wenham, S.R.; Ebong, A.; Taouk, M.; Tang, Y.-H.; Ghozati, S.; Yun, F.; Grados, A.; Green, M.A.; Warta, W.


IEEE Electron Devices Society; Institute of Electrical and Electronics Engineers -IEEE-:
IEEE First World Conference on Photovoltaic Energy Conversion 1994. Vol.2 : Conference record of the Twenty Fourth IEEE Photovoltaic Specialists Conference 1994; Hilton Waikoloa Village, Waikoloa, Hawaii, December 5 - 9, 1994
Piscataway, NJ: IEEE Service Center, 1994
ISSN: 0160-8371
ISBN: 0-7803-1460-3
ISBN: 0-7803-1459-X
ISBN: 0-7803-1461-1
World Conference on Photovoltaic Energy Conversion <1, 1994, Waikoloa/Hawaii>
Photovoltaic Specialists Conference <24, 1994, Waikoloa/Hawaii>
Fraunhofer ISE ()

The buried contact (BC) technology has demonstrated both an efficiency and cost advantage over conventional screen printed solar cells. New BC structures, in particular the double sided (DS) BC cell, allow further improvements in cost and efficiency. Improvements in efficiency arise through improved rear surface passivation. Experimental results from DSBC cells using various passivation methods demonstrate that a floating junction (FJ) passivates as well as passivation schemes used with high efficiency cells. 2D analysis and experimental results both show localised defects have prevented FJ passivation from achieving its potential and that optimization of the rear doping or by bifacial operation can improve performance.