Electrochemical isothermal-capacitance-transient spectroscopy: A new depth profiling method of deep levels

Wang, S. Q.; Lu, F.; Oh, D. C.; Chang, J. H.; Hanada, T.; Yao, T.
September 2011
Review of Scientific Instruments;Sep2011, Vol. 82 Issue 9, p093905
Academic Journal
The authors report on a new depth profiling method of deep levels, which we call electrochemical isothermal-capacitance-transient spectroscopy (EICTS). This is combined with electrochemical capacitance-voltage using the Schottky barrier of etchable electrolyte and isothermal-capacitance-transient spectroscopy using the capacitance-transient profile at a fixed temperature. We proved its validity by applying to the ZnSe:N epitaxial film of thickness of more than 1000 nm and comparing the characteristics of an obtained deep level with the results measured by conventional deep-level detection techniques. It is expected that EICTS is very effective to assess the deep levels of wide-bandgap semiconductors that suffer from various point defects and their complexes.


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