Leading ‘Solar Module Super League’ (SMSL) member JinkoSolar has set a new record conversion efficiency of 24.90% for its N-type TOPCon monocrystalline silicon solar cell that has been independently verified by the Institute for Solar Energy Research in Hamelin (ISFH), Germany.
Leading ‘Solar Module Super League’ (SMSL) member JinkoSolar has achieved a record large-area N-type monocrystalline silicon solar cell conversion efficiency of 24.79%, independently confirmed by the Institute for Solar Energy Research in Hamelin (ISFH), Germany.
‘Solar Module Super League’ (SMSL) member, Trina Solar has set a conversion efficiency record of 24.58% for an i-TOPCon (Industrial Tunnel Oxide Passivated Contact) bifacial solar cell using a super-sized 244.62 cm2 wafer.
Today’s industry standard B-doped monocrystalline silicon still suffers from light-induced degradation of the carrier lifetime. Illumination at elevated temperature leads to a so-called regeneration, i.e. a recovery of the carrier lifetime as well as the solar cell efficiency. However, even though the carrier lifetime on test wafers increases from about 1 ms after processing to 3 ms after regeneration, the corresponding PERC+ cell efficiencies in both states are identical. We discuss possible reasons for this discrepancy. Additionally, we evaluate B-doped Czochralski silicon wafers with an ultra-low oxygen content of 2.6 ppma as well as industrial Ga-doped wafers. Both wafer materials are completely LID-free in lifetime measurements and PERC+ cell efficiencies and enable up to 0.4%abs higher efficiencies than present industry-typical boron-doped wafers.
The Institute for Solar Energy Research Hamelin (ISFH) and the Leibniz Universität Hannover have produced lab cells using polysilicon on oxide – POLO – junctions, in an interdigitated pattern on the rear side and a specially treated p-type monocrystalline wafer to record a cell conversion efficiency of 26.1%.
Finlay Colville talks to Linda Koschier and Stuart Wenham about University of New South Wales (UNSW) alumni having prominent solar cell industry positions and technology issues such as advanced hydrogenation,