INFRARED INTERNAL REFLECTION STUDIES OF THE GERMANIUM-ELECTROLYTE INTERFACE.
WESTERN RESERVE UNIV CLEVELAND OHIO ELECTROCHEMISTRY RESEARCH LAB
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Infrared internal reflection spectroscopy has been used to study the germanium electrode interface with the objective of determining the applicability of the method to the study of adsorption from solution and the semiconductor space-charge region. The sensitivity of the present instrumentation was sufficient to detect the C-H stretching frequency of a monolayer of an adsorbed organic molecule with D2O as the solvent but insufficient to follow small changes in surface coverage. The study of the excess carrier concentration in the space charge appears promising using a technique involving the square-wave modulation of the electrode potential with the signal from the thermocouple detector of the infrared spectiometer amplified with a phase sensitive tuned amplifier. The dependence of the spectra so recorded, on wavelength and bias and modulation potentials have been examined for n-type germanium of 1.0 and 10.0 ohm-cm. Experimental results are qualitatively in accord with predictions. Author
- Atomic and Molecular Physics and Spectroscopy