Anodic electrosynthesis of cadmium selenide thin films; Characterization and comparison with the passive/transpassive behavior of CdX (X = S,Te) counterpart
- Dept. of Chemistry, Univ. of Texas at Arlington, Arlington, TX (US)
This paper reports on cadmium selenide thin films electrosynthesized by an anodic route employing alkaline selenide solutions. The thermodynamic aspects of the electrodeposition chemistry were first explored via Pourbaix diagrams; the kinetic aspects were studied by linear sweep voltammetry on a Cd anode. The photoaction spectra of these anodic thin films revealed an optical gap energy (1.7 eV) in good agreement with the value known for CdSe. Their luminescence response, however, suggested a high density of carrier recombination centers located {approximately}0.2 eV below the conduction band. X-ray photoelectron spectroscopy revealed that the anodic thin films were stoichiometric in composition. In situ examination of the material during thin film growth by cyclic photovoltammetry revealed anodic photoeffects at potentials just past the Cd corrosion wave. The growth kinetics in the passive region adhered to a direct logarithmic rate law, while a diffusion mechanism was seen to prevail in the transpassive regime.
- OSTI ID:
- 6170045
- Journal Information:
- Journal of the Electrochemical Society; (United States), Vol. 138:1; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CADMIUM SELENIDES
ELECTROCHEMISTRY
CADMIUM TELLURIDES
CHEMICAL REACTION KINETICS
ELECTRODEPOSITION
MATHEMATICAL MODELS
STRUCTURAL CHEMICAL ANALYSIS
THERMODYNAMICS
THIN FILMS
VOLTAMETRY
CADMIUM COMPOUNDS
CHALCOGENIDES
CHEMISTRY
DEPOSITION
ELECTROLYSIS
FILMS
KINETICS
LYSIS
REACTION KINETICS
SELENIDES
SELENIUM COMPOUNDS
SURFACE COATING
TELLURIDES
TELLURIUM COMPOUNDS
360601* - Other Materials- Preparation & Manufacture
400400 - Electrochemistry