Premium
Conversion of CuS thin films to structured nanosheet Cu y S (1 < y ≦ 2) by vacuum annealing
Author(s) -
Shi J. B.,
Wu P. F.,
Chen Y. C.,
Chang Y. C.,
Tsai M. Z.,
Cheng F. C.,
Kao C. T.,
Lee H. W.,
Chen M. Y.,
Huang Y. J.,
Huang R. Y.,
Lin S. K.
Publication year - 2014
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201400176
Subject(s) - annealing (glass) , thin film , materials science , nanosheet , analytical chemistry (journal) , nano , nanotechnology , composite material , chemistry , chromatography
In this study, large‐area and uniform thickness novel nano‐sheet structured CuS thin films on ITO glass have been prepared by the one‐step electrodeposition method from a dimethyl sulfoxide solution. Thin films of completely preserved nano‐sheet like morphology of Cu y S (y = 1.75, 1.8, 1.95, and 2.0) are grown by vacuum annealing CuS thin films at 500 °C for different lengths of time. The 500 °C sample heated for 10 hours was nearly converted to single phase of Cu 2 S with y ∼ 2. The optical direct band gaps of nano‐sheet Cu y S thin films annealed at 500 °C of 2, 6, and 10 hours in vacuum were found to be 1.94, 1.68, and 1.44 eV, respectively.