Oscillation of the light intensity

This has been explored by a number of workers as a probe for surface species [152, 193-196]. If the intensity of the light has the form 

Evidently, the photocurrent will normally /ead the light intensity, a fact that may be traced to the expression for the coverage, ft, of T. Other, more complex expressions may, of course, be derived within the above formalism, which is mainly due to Albery and Bartlett [152] unless low frequencies are employed, it is unlikely that transport limitations will play an important role. 

The detailed experimental data for p-GaP are shown in Fig. 96. Analysis using a close analogue of eqn. (595) for a p-type semiconductor leads, under the assumption that kaC0 is very small, to k jp 103 s Very recently, the experiment has been substantially extended by Peter and co-workers [193— 196] and applied to a range of semiconductor systems. 

---