K. Durose
Cdsxte1-x: bulk vapour growth, twin formation and the electrical activity of twin boundaries
Durose, K.; Yates, A.J.W.; Szczerbakow, A.; Domagala, J.; Golacki, Z.; Swiatek, K.
Authors
A.J.W. Yates
A. Szczerbakow
J. Domagala
Z. Golacki
K. Swiatek
Abstract
CdSxTe1-x has been used as a model substance to investigate crystal growth from the vapour, twinning phenomena and the electrical properties of grain boundaries. A self-selecting vapour growth method produced solid solutions of CdSxTe1-x (x approximate to 0.067) with compositional uniformity of <2% of x (i.e. <0.0013) as determined by x-ray diffraction and photoluminescence spectroscopy. The CdSxTe1-x crystals were highly twinned. Statistical tests showed that the twin boundaries are spatially correlated. A model for twin formation based on nucleation and grain size development is proposed. Band bending at grain and twin boundaries in CdTe and in CdSxTe1-x was measured using the scanning electron microscope remote electron beam induced current technique. Boundaries in CdTe have downward band bending, but those in CdSxTe1-x have upward band bending. Decoration of grain boundaries with Te inclusions reduced the band bending effect in CdTe. It is postulated that the grain boundary passivation in CdTe/CdS solar cells is partly caused by enrichment of the grain boundaries in CdTe with CdSxTe1-x and partly by the Te enrichment that occurs during processing.
Citation
Durose, K., Yates, A., Szczerbakow, A., Domagala, J., Golacki, Z., & Swiatek, K. (2002). Cdsxte1-x: bulk vapour growth, twin formation and the electrical activity of twin boundaries. Journal of Physics D: Applied Physics, 35(16), 1997-2007. https://doi.org/10.1088/0022-3727/35/16/314
Journal Article Type | Article |
---|---|
Publication Date | Aug 21, 2002 |
Deposit Date | Dec 13, 2006 |
Journal | Journal of Physics D: Applied Physics |
Print ISSN | 0022-3727 |
Electronic ISSN | 1361-6463 |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 35 |
Issue | 16 |
Pages | 1997-2007 |
DOI | https://doi.org/10.1088/0022-3727/35/16/314 |
Keywords | CDTE Pseudobinary system, CDS/CDTE solar-cells, Grain-boundaries, Phase-diagram, Semiconductors, Crystals, CDCL2. |
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