High-efficiency PERL and PERT silicon solar cells on FZ and MCZ substrates

High-efficiency PERL (passivated emitter, rear locally diffused) and PERT ( passivated emitter, rear totally diffused) silicon solar cells have been fa bricated on FZ and MCZ (magnetically confined Czochralski) substrates at th e University of New South Wales. One of the PERL cells on FZ substrates dem onstrated 24.7% efficiency at Sandia National Laboratories under the standa rd global AM1.5 spectrum (100 mW/cm(2)) at 25 degreesC. Another PERT cell o n a MCZ substrate, supplied by SEH, Japan, demonstrated 24.5% efficiency at Sandia under the same test conditions. Both these efficiencies are the hig hest ever reported for FZ and MCZ silicon cells, respectively. The cells ma de on MCZ substrates also showed stable cell performance. (C) 2001 Elsevier Science B.V. All rights reserved.