UNSW School of Photovoltaic & Renewable Energy Engineering
Improved carrier selectivity of diffused silicon wafer solar cells
Alexander To - UNSW SPREE

Alexander To, at UNSW SPREE, 12 October 2017

Alexander To (55Min)


Alexander To speaks at UNSW SPREE


The majority of commercial solar cells are fabricated on crystalline silicon wafers with diffused homojunctions. This is forecast to continue into the near future. This talk is about how improving the carrier selectivity of homojunction solar cells can achieve higher conversion efficiencies, by reducing the losses at the contacts and non-contacted surfaces. The majority carrier conductivity at the metal-silicon contacts is investigated for both heavily doped n+ and p+ silicon. In addition, a novel method of extracting the interface parameters Sn0/Sp0 and Qf from photoconductance lifetime measurements is presented. Finally, modelling of the surface recombination of a diffused homojunction IBC solar cell is presented.

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Brief Bio

Alex recently submitted his PhD thesis, working in the 1st generation silicon group with Bram Hoex and Alison Lennon. Prior to that, he completed his bachelor degree in photovoltaic engineering, also at UNSW. Alex's research interests include surface passivation, carrier selective contacts, and solar cell fabrication and processing.