Sodium distribution in solar-grade Cu2ZnSnS4 layers using atom-probe tomographic technique

Shin Tajima, Ryoji Asahi, Dieter Isheim, David N Seidman, Tadayoshi Itoh, Kei Ichiro Ohishi

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


To investigate the effect of alkali doping on Cu2ZnSnS4 (CZTS) photovoltaic cells, we studied compositional distributions in CZTS layers using three-dimensional atom-probe tomography. The segregation of Na at a concentration of approximately 1 at.% was observed predominantly at CZTS grain boundaries. The concentration of Na in the interior of the CZTS grains was below the detection limit (approximately 40 ppm). Na ions may exist as sulfide compounds at CZTS grain boundaries, independent of the presence of oxygen.

Original languageEnglish (US)
Article number112302
JournalJapanese Journal of Applied Physics
Issue number11
StatePublished - Jan 1 2015

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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