Sodium distribution in solar-grade Cu sub(2) ZnSnS sub(4) layers using atom-probe tomographic technique

Sodium distribution in solar-grade Cu sub(2) ZnSnS sub(4) layers using atom-probe tomographic technique

To investigate the effect of alkali doping on Cu sub(2) ZnSnS sub(4)(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 gra...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Japanese Journal of Applied Physics 2015-11, Vol.54 (11)
Hauptverfasser: Tajima, Shin, Asahi, Ryoji, Isheim, Dieter, Seidman, David N, Itoh, Tadayoshi, Ohishi, Kei-ichiro
Format: Artikel
Sprache:eng
Schlagworte:
Composition effects
CZT
Grain boundaries
Segregations
Sodium
Sulfides
Three dimensional
Tomography
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:To investigate the effect of alkali doping on Cu sub(2) ZnSnS sub(4)(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.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.54.112302