Anodic electrode reaction of p-type silicon in 1-ethyl-3-methylimidazolium fluorohydrogenate room-temperature ionic liquid

Tetsuya Tsuda, Toshiyuki Nohira, Koji Amezawa, Kan Hachiya, Rika Hagiwara, Ofer Raz, Yair Ein-Eli

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The anodic electrode behavior for a p-type silicon single crystal electrode ((1 0 0), ρ = 0.01-0.02 Ω cm, boron doped) was examined in the 1-ethyl-3-methylimidazolium fluorohydrogenate, EtMeIm(FH)2.3F, room-temperature ionic liquid (RTIL). The electrochemical behavior was very similar to that in conventional HF aqueous solution. After the anodic electrode reaction, the Si electrode was uniformly covered with a mesoporous Si layer having a pore size of ∼25 nm. The mesoporous layer did not exhibit a photoluminescence spectrum in the visible region due to the lack of Si-H termination. However, after chemical treatment with an ethanolic HF solution, a subset of the porous Si samples showed a very weak photoluminescence.

Original languageEnglish
Pages (from-to)3650-3655
Number of pages6
JournalElectrochimica Acta
Volume53
Issue number10
DOIs
Publication statusPublished - 2008 Apr 1
Externally publishedYes

Keywords

  • Anodic electrode reaction
  • EtMeIm(FH)F
  • Photoluminescence
  • Porous silicon
  • Room-temperature ionic liquid (RTIL)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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