Single wire radial junction photovoltaic devices fabricated using aluminum catalyzed silicon nanowires

Y. Ke, X. Wang, X. J. Weng, C. E. Kendrick, Y. A. Yu, S. M. Eichfeld, H. P. Yoon, J. M. Redwing, T. S. Mayer, Y. M. Habib

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Single nanowire radial junction solar cell devices were fabricated using Si nanowires synthesized by Al-catalyzed vapor-liquid-solid growth of the p + core (Al auto-doping) and thin film deposition of the n +-shell at temperatures below 650 °C. Short circuit current densities of ∼ 11.7mAcm- 2 were measured under 1-sun AM1.5G illumination, showing enhanced optical absorption. The power conversion efficiencies were limited to < 1% by the low open circuit voltage and fill factor of the devices, which was attributed to junction shunt leakage promoted by the high p+/n+ doping. This demonstration of a radial junction device represents an important advance in the use of Al-catalyzed Si nanowire growth for low cost photovoltaics.

Original languageEnglish (US)
Article number445401
JournalNanotechnology
Volume22
Issue number44
DOIs
StatePublished - Nov 4 2011

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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