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Characterization of copper iodide thin films fabricated via laser‐assisted molecular‐beam deposition

 

作者: W. M. K. P. Wijekoon,   M. Y. M. Lyktey,   P. N. Prasad,   J. F. Garvey,  

 

期刊: Journal of Applied Physics  (AIP Available online 1993)
卷期: Volume 74, issue 9  

页码: 5767-5772

 

ISSN:0021-8979

 

年代: 1993

 

DOI:10.1063/1.354197

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The technique of laser‐assisted molecular‐beam deposition (LAMBD) has been used to fabricate a molecular film by reaction in a molecular beam. Molecular iodine vapor entrained into a stream of helium carrier gas was introduced via a supersonic expansion into the plasma plume of laser‐evaporated copper to produce copper iodide. Films were deposited on substrates that were situated about 3 cm downstream on the path of the molecular beam. The surface morphology of films depends greatly on the fluence of the incident laser beam and expansion conditions. Films grown at low laser powers show small surface inhomogeneities in their electron micrographs compared to the films that were grown at higher laser powers. Copper in the LAMBD films is found to be mainly in the Cu+1state as characterized by electron spectroscopy for chemical analysis. A comparison of the surface and structural properties of LAMBD films with that of a vacuum‐evaporated film suggests that both films have similar lattice structures and compositions. It seems that LAMBD can be a powerful technique to deposit novel molecular and composite films for electronics and photonics.

 

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