Low-temperature direct conversion of Cu-In films to CuInSe 2 via selenization reaction in supercritical fluid

Takaaki Tomai, Dinesh Rangappa, Itaru Honma

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this study, we achieve the direct conversion of metallic Cu-In films to compound semiconductor CuInSe 2 films, at quite low temperature around 300 °C using less hazardous metalorganic selenium source in supercritical fluid (SCF). We investigated the effects of temperature and fluid (ethanol) density, and found that supercritical ethanol plays a crucial role in this low-temperature selenization reaction. Such SCF-assisted direct conversion reactions can facilitate large-scale, low-temperature, and rapid synthesis of CuInSe 2 films, which can potentially lead to the low-cost production of solar cells.

Original languageEnglish
Pages (from-to)3268-3271
Number of pages4
JournalACS Applied Materials and Interfaces
Issue number9
Publication statusPublished - 2011 Sep 28


  • CIS/CIGS solar cells
  • and supercritical fluid
  • compound semiconductor
  • conversion reaction

ASJC Scopus subject areas

  • Materials Science(all)

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