Structural studies of copper sulfide films: Effect of ambient atmosphere

Manisha Kundu, Tsuyoshi Hasegawa, Kazuya Terabe, Kazuhiro Yamamoto, Masakazu Aono

研究成果: Article

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We examined the structural properties of copper sulfide films as a function of the sulfurization time of 70-nm-thick Cu films. Copper sulfide films with various phases such as mixed metallic Cu-chalcocite, chalcocite, roxbyite, and covellite phases were formed with increasing sulfurization time. To evaluate the structural stability of various films, all the films were exposed to the ambient atmosphere for the same amount of time. Although the phase structure and stoichiometry of the films were maintained at a greater depth, the near-surface region of the films was oxidized and covered with overlayers of oxide, hydroxide, and/or sulfate species due to the exposure and reaction with the ambient atmosphere. The oxygen uptake and its reactivity with the copper sulfide film surfaces were enhanced with increasing sulfur content of the films. In addition, the type of divalent state of copper formed on the film surfaces depended on the phase structure, composition, and stoichiometry of the films.

元の言語English
記事番号035011
ジャーナルScience and Technology of Advanced Materials
9
発行部数3
DOI
出版物ステータスPublished - 2008 7 1
外部発表Yes

ASJC Scopus subject areas

  • Materials Science(all)

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