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

doi:10.7567/JJAP.54.112302

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

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

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 language	English (US)
Article number	112302
Journal	Japanese Journal of Applied Physics
Volume	54
Issue number	11
DOIs	https://doi.org/10.7567/JJAP.54.112302
State	Published - Nov 2015

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.7567/JJAP.54.112302

Cite this

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title = "Sodium distribution in solar-grade Cu2ZnSnS4 layers using atom-probe tomographic technique",

abstract = "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.",

author = "Shin Tajima and Ryoji Asahi and Dieter Isheim and Seidman, {David N.} and Tadayoshi Itoh and Ohishi, {Kei Ichiro}",

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AU - Tajima, Shin

AU - Asahi, Ryoji

AU - Isheim, Dieter

AU - Seidman, David N.

AU - Itoh, Tadayoshi

AU - Ohishi, Kei Ichiro

PY - 2015/11

Y1 - 2015/11

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AB - 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.

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