Optimization of the synthesis and characterizations of chemical bath deposited Cu2S thin films - 18/10/10
, Tarak Ben Nasr a, Cathy Guasch b, Najoua Kamoun Turki a| pages | 6 |
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Abstract |
Semiconducting copper sulphide (Cu2S) thin films have been deposited on various substrates (SnO2:F/glass, glass) by the simple and economical chemical bath deposition technique. The depositions were carried out during a deposition time of about 32.5min in the pH range of 9.4 to 11. The synthesized Cu2S thin films were characterized using various techniques without any annealing treatment. X-ray diffraction study shows that Cu2S films exhibit the best crystallinity for pH=10.2. For this pH value, Auger electron spectroscopy investigations show that Cu2S thin films grown on an SnO2/glass substrate exhibit stochiometric composition with [Cu]/[S] concentrations ratio equal to 2.02. Using the Kelvin method, the work function difference (Фmaterial– Фprobe) for the Cu2S films deposited on SnO2/glass substrates at the optimum pH value was found to be equal to 145meV. Hall measurements confirm the p-type electrical conductivity of the obtained films. The electrical resistivity was of the order of 3.85×10−4Ω-cm. The transmission and reflection coefficients vary in the range of [35–60]% and [5–15]% respectively, in the visible range, and the band gap energy is about 2.37eV.
Le texte complet de cet article est disponible en PDF.Keywords : Cu2S thin films, Chemical bath deposition, Structural and optical characterizations
Plan
Vol 13 - N° 11
P. 1364-1369 - novembre 2010 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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