Green, M. A.Blakers, A. W.Narayanan, S.Taouk, M.2026-01-042026-01-040379-6787ORCID:/0000-0002-0800-2276/work/162946143https://hdl.handle.net/1885/733803572The passivated emitter solar cell (PESC) structure has been responsible for recent improvements in silicon solar cell performance. The effect of substrate resistivity upon PESC cell performance is described. Also described is the performance of cells on both 0.5 ω cm Czochralski and float zone substrates. Finally recent results are described which have resulted in 19.8% energy conversion efficiencies measured relative to NASA calibrated reference cells.We acknowledge the contributions to this work of other members of the Solar Photovoltaic Laboratory, particularly E. M. Keller, T. Szpitalak, S. R. Wenham and M. R. WiUison. We would also like to thank C. Osterwald, B. Rose and their colleagues at SERI and Sandia respectively for detailed cell characterization. We acknowledge the assistance of N. Arberger and O. Holl-richer of Wacker-Chemitronic in securing sample quantities of high quality float zone silicon. One of us (A.W.B.) acknowledges the support of a Radio Research Board Postdoctoral Fellowship. We also acknowledge the past support of this work by the Australian National Energy Research, Development and Demonstration Council. The Solar Photovoltaic Laboratory forms part of the Joint Microelectronics Research Centre which is supported by the Commonwealth Program for the Promotion of Excellence in Research.9en198610.1016/0379-6787(86)90060-846149140591