Magdalena Osial

Electrochemical preparation and characterization of CdTe thin films

Magdalena Osial, UW ,
Supervisor: prof. dr. hab. Krystyna Jackowska (UW)

We have investigated an influence of electrodeposition conditions of CdTe thin films on their structural, compositional, optical and photoelectrochemical properties. The CdTe was prepared by electrodeposition in acidic solutions containing different cadmium and tellurium ions concentration. Thin as-deposited CdTe films were studied by different techniques. The Raman and XPS spectra exhibited CdTe formation on the electrode with some amount of tellurium oxides and cadmium oxides. Structural XRD studies revealed polycrystallinity of deposits with the cubic (111) form. SEM studies have shown granular morphology of CdTe thin films. Optical band gap energy were found in the range from 1.36 to 1.6 eV. The preliminary photoelectrochemical studies shown that application of different deposition potentials and bath compositions leads to the formation of p-type or n-type CdTe films.

Discussion

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