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CuInS 2 films using repeated chemical spray pyrolysis
Author(s) -
John Teny Theresa,
Wilson K. C.,
Ratheesh Kumar P. M.,
Sudha Kartha C.,
Vijayakumar K. P.,
Kashiwaba Y.,
Abe T.,
Yasuhiro Y.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200406875
Subject(s) - x ray photoelectron spectroscopy , crystallinity , materials science , photosensitivity , analytical chemistry (journal) , conductivity , substrate (aquarium) , electrical resistivity and conductivity , oxygen , chemical engineering , chemistry , composite material , optoelectronics , oceanography , electrical engineering , organic chemistry , chromatography , engineering , geology
CuInS 2 films of thickness 1.17 µm were deposited onto glass substrates using repeated spraying technique without any pinholes on the samples. It has been shown that the structure, optical and electrical properties depend on the [Cu]/[In] ratio taken in the solution. Studies using X‐ray Diffraction, X‐ray Photoelectron Spectroscopy (XPS), Energy Dispersive X‐ray Analysis (EDX), optical absorption, photosensitivity and conductivity measurements proved this. Moreover, XPS depth‐profiling revealed that there is no oxygen present in the bulk of the film; even though it was prepared using repeated spraying. Oxygen was present only in few atomic layers at the surface of the film and near the substrate–film interface. Use of Cu‐rich initial solution resulted in better crystallinity as well as conductivity. EDX measurements showed that [Cu]/[In] ratio in the film is slightly less than that taken in the solution. Photosensitivity of the samples decreased with increase in [Cu]/[In] ratio. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)