Abstract: The photoelectric effect of the n-Zn_xCd_1-x/Te (x=0.01-0.04) single crystal electrode is generally rather low. However, the photocurrent is improved apparently with FeCl₃ dipping. Using Pb(NO₃)₂ as a dipping solution, both the fill factor and open-circuit voltage rise significantly. The conversion efficiency is enhanced to 10.2%. The cyclic voltammetric curves for the electrodes treated under different conditions have been measured. It is found that the electrode dipped in FeCl₃ has the largest cathodic leakage current, and that there is a reduction peak at-0.9V(vs. S. C. E.). The one dipped in Pb(NO₃)₂ has the beat stability. The modification mechanism of this electrode has been discussed in detail.

Key words: photoelectrochemistry, Zn_xCd_1-xTe, Pb(NO₃)₂, FeCl₃