Carbon nanotube semitransparent electrodes for amorphous silicon based photovoltaic devices

Silvano del Gobbo, P. Castrucci, Luca Camilli, M. Scarselli, M. De Crescenzi, L. Mariucci, A. Valletta, G. Fotunato

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Different amounts of single wall carbon nanotubes SWCNTs have been sprayed on amorphous silicon substrates to form Schottky barrier solar cells. The measured external quantum efficiency showed a spectral behavior depending on the SWCNT network optical transparency, presenting a maximum up to 35% at a wavelength of about 460 nm. Ultrathin network of SWCNTs acts as semitransparent electrode and forms Schottky barrier with amorphous silicon, enabling new generation low cost amorphous silicon based solar cells. Numerical simulations show a poor efficiency of SWCNT contacts in collecting holes suggesting that improvement in contact quality is needed to further improve solar cell efficiency.
Original languageEnglish
JournalApplied Physics Letters
Volume98
Number of pages3
ISSN0003-6951
DOIs
Publication statusPublished - 6 May 2011
Externally publishedYes

Keywords

  • Carbon nanotubes
  • Solar Cells
  • electrodes
  • amorphous semiconductors
  • Heterojunctions

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