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that the plateau region is between and in 2.5% HF. It drops to 1 at cur-
rents higher than At very low light intensities the quantum efficiency approaches 4,
that is, current quadrupling occurs, as shown in Fig. 5.13.
599
This change of quantum
efficiency with light intensity does not occur in nonfluoride solutions as shown in Fig.
5.14.
74
Figure 5.15 shows the spectral response of
n-
Si in a solution of
solution. The semiconductor/electrolyte
