Effects of Recombination in Space Charge Region

Reichman calculated the current-potential characteristics based on the above consideration. The results are shown in Fig. 23. In the calculation, the current due to majority carrier is also taken into account but surface recombination is neglected. Horowitz applied Reichman s treatment to show that a discrepancy observed at p-GaP 

Khan and Bockris presented a model which accounts for charge transfer kinetics and surface recombination as well as potential drop in the Helmholtz layer. In their paper, they estimated the transit time across the space charge region and the lifetime of the minority carrier and showed that it is reasonable to neglect the 

So far only the recombination in the bulk and at the surface of the semiconductor are considered and the recombination in the space charge region is neglected. The assumption is valid only if the transit time of the photogenerated minority carriers across the depletion region is less than the minority carrier lifetime.151 167 

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