Silicon/Electrolyte Interface - Electrochemistry of Silicon and Its Oxide - page 82

concentration in the HF electrolyte used to deposit the metals. 942 The amount of
shift is about 0.3 V for a coverage of about one monolayer of gold.
2.7.4. Band Diagrams
The band diagram of silicon electrode in an electrolyte can be drawn when the
flatband potential of the interface is determined. Figure 2.34 shows the band diagrams
for various silicon/electrolyte interfaces. As described above, the flatband potential
depends on many factors specific to the silicon/electrolyte interface under a given set
of experimental conditions, as does the band diagram.
2.8. OPEN-CIRCUIT POTENTIALS
As the most easily measurable electrochemical parameter, the open-circuit poten-
tial (OCP) is routinely used to indicate the condition, stability, and reproducibility of
an electrode during experiments. Table 2.16 shows the OCP values of silicon electrodes
in various electrolytes.
2.8.1. Effect of Various Factors
Figures 2.35 and 2.36 show the effect of silicon substrate conditions on OCP in
an alkaline solution. 269 For the p -type materials, OCP appears to be lower at high doping
levels with no clear difference between different orientations. For n -type materials,