Characterization of Chemical Bath Deposited CdSe Thin Films Doped with S super(2-)

CdSe thin films doped with S super(-2), growing on glass substrates using the chemical bath deposition (CBD) at temperature of T = 80 degree C, with precursor solutions: CdCl sub(2) 0.01 M, KOH 0.1 M, 0.5 M, SeC(NH sub(2)) sub(2) 0.04 M, NH sub(4)NO sub(3), SC(NH sub(2)) sub(2) 0.2 M, 5, 10, 15, 20,...

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Bibliographic Details
Published in:Journal of materials science and engineering. B 2011-11, Vol.1 (5), p.657-666
Main Authors: Rascon, JIC, Moreno, O P, Avila, G A, Cerna, J R, Tecorralco, J H, Juarez, J M, Morales, R L, Angel, OZ
Format: Article
Language:English
Subjects:
Cadmium selenides
Deposition
Doped films
Doping
Intermetallics
Mathematical models
Quantum confinement
Thin films
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Summary:CdSe thin films doped with S super(-2), growing on glass substrates using the chemical bath deposition (CBD) at temperature of T = 80 degree C, with precursor solutions: CdCl sub(2) 0.01 M, KOH 0.1 M, 0.5 M, SeC(NH sub(2)) sub(2) 0.04 M, NH sub(4)NO sub(3), SC(NH sub(2)) sub(2) 0.2 M, 5, 10, 15, 20, 25 and 30 mL of doping. The concentration of atoms was obtained by Scanning Electron Microscopy (SEM), S = 14.11-42.57, Cd = 49.11-59.59, and Se = 50.99-2.29, X-ray diffraction, identifies mixture of Wurzite/Zinc blende doped films phases and size of grain of 24-15 ran. Optical Absorption Spectra have redshifts of the forbidden band gap (E sub(g)) of 1.8-2.3 eV. Raman spectra (RS) show the Raman shift, confirming formation of nanocrystals. From the dark conductivity vs. 1/kT behavior on the 100-500 K range, attributed to doping effects at the grain boundaries and quantum confinements. A thermodynamic model is proposed using the equation of Nernst to evaluate changes in the Gibbs free energy and investigate the spontaneity of reactions.
ISSN:2161-6221