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Photoinduced Topotaxial Exchange Reactions in Cadmium Sulphide Thin Films

Published online by Cambridge University Press:  28 February 2011

T. J. Cumberbatch ,
P. E. Barden  and
J. Knightley
T. J. Cumberbatch
Affiliation:
Engineering Department, Cambridge University, Trumpington Street, Cambridge, England CB2 lPZ
P. E. Barden
Affiliation:
Engineering Department, Cambridge University, Trumpington Street, Cambridge, England CB2 lPZ
J. Knightley
Affiliation:
Engineering Department, Cambridge University, Trumpington Street, Cambridge, England CB2 lPZ
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Abstract

A CO2 laser, operating at 10.6μm, has been used to promote the growth of topotaxial layers of the chalcocite phase of cuprous sulphide in cadmium sulphide thin films immersed in an organic solution of a cuprous salt at ambient temperature. Cuprous sulphide growth is initiated by the laser beam which passes through the liquid and raises the surface temperature of the CdS allowing ion exchange to take place without changing the surface topography. An investigation into different combinations of organic solvents and cuprous/cupric salts has revealed that cuprous iodide in acetonitrile or propionitrile yields the fastest growth rates. The results are compared with those obtained from junctions fabricated using lasers operating in the visible frequency range.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 75: Symposium B – Photon, Beam, and Plasma Stimulated Chemical Processes at Surfaces , 1986 , 731
Copyright
Copyright © Materials Research Society 1987

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References

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