Stabilization of n-Si electrodes by surface alkylation and metal nano-dot coating for use in efficient photoelectrochemical solar cells

Keisuke Nakato, Susumu Takabayashi, Akihito Imanishi, Kei Murakoshi, Yoshihiro Nakato

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Surface methylated and Pt nano-dotted single crystal n-Si (111) electrodes yielded efficient photocurrent density (j) vs. potential (U) characteristics for more than 6h in a highly corrosive electrolyte of aqueous 8.6M HBr+0.05M Br2. On the other hand, H-terminated and Pt nano-dotted n-Si electrodes degraded seriously in about 15min. Surface methylated but non-Pt-dotted n-Si electrodes yielded only poor j-U characteristics with low Voc. The results clearly show that a combination of surface alkylation and metal nano-dot coating is an effective way to obtain efficient and stable Si photoelectrodes and hence photoelectrochemical solar cells.

Original languageEnglish
Pages (from-to)323-330
Number of pages8
JournalSolar Energy Materials and Solar Cells
Volume83
Issue number4
DOIs
Publication statusPublished - 2004 Jul 1

Keywords

  • Corrosion
  • Liquid junction
  • Nano-particle
  • Platinum
  • Surface modification

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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