'Making accurate photoconductance measurements of recombination and estimating uncertainty' and 'Multi-millisecond n-type Si wafers for high efficiency silicon solar cells: Overcoming feedstock and ingot related challenges'
Dr Andrew Thomson and Dr Fiacre Rougieux (Australian National University)
CSES SEMINAR SERIES Solar SeminarDATE: 2013-04-11
TIME: 14:00:00 - 15:00:00
LOCATION: Ian Ross Seminar Room
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ABSTRACT:
Dr Andrew Thomson 14:00-14:40
I will discuss the theory and practical elements of performing photoconductance measurements of recombination in silicon, where I hope to give general laboratory users and new Ph.D. students a better background in the technique. I will also include a discussion of some work I have recently submitted to the Journal of Photovotaics where I have performed an uncertainty analysis of photoconductance measurements of the emitter saturation current density.
Dr Fiacre Rougieux 14:40-15:00
In order to unleash the full potential of high efficiency silicon solar cells, the most harmful defects in n-type silicon wafers must be identified. Such defects either originate in the feedstock or are incorporated during ingot growth (grown-in defects). We expose a novel efficiency-limiting grown-in defect in high-purity Cz silicon. The defect is shown to be thermally de-activated around 400C. We also expose current challenges facing n-type silicon from the metallurgical route and opportunities deriving from higher purity UMG silicon.
BIO:
Andy graduated with his Ph.D. in 2010 from the ANU, prior to that he completed a bachelor of engineering at the University of Canberbury, Christchurch. He is soon to be come an Australian Solar Institute Post-Doctoral Research Fellow, where he hopes to continue his work on thin-film coatings for solar cells.
Fiacre graduated with his Ph.D. in 2012 from the ANU, prior to that he completed a M.Eng from the National Institute of Applied Science in France, and a C.Eng from the Ecole Polytechnique de Montreal. He is currently an Australian Solar Institute Post-Doctoral Research Fellow researching solar grade silicon, advanced solar cell processes and siliicon defects.
