Photoelectrochemical properties of size-quantized CdS thin films prepared by an electrochemical method

Tsukasa Torimoto, Shuhei Nagakubo, Matsuhiko Nishizawa, Hiroshi Yoneyama

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Size-quantized CdS thin films were prepared by sequential underpotential deposition of S and Cd on Au(111). The prepared films in an aqueous solution containing triethanolamine as a sacrificial electron donor showed n-type photoelectrode behaviors. Action spectra of anodic photocurrents were red-shifted with an increase of the film thickness toward characteristic values of those of bulk materials. The energy gap of the film determined from the action spectra showed a remarkable tendency of decrease with an increase of the film thickness up to 3.5 nm. Beyond 3.5 nm the rate of decrease with increase in the film thickness declined. An energy gap value characteristic of bulk materials was obtained with CdS films greater than 6.8 nm.

Original languageEnglish
Pages (from-to)7077-7081
Number of pages5
JournalLangmuir
Volume14
Issue number25
DOIs
Publication statusPublished - 1998 Dec 8
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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