A Simple Model for Light-Driven Water-Splitting Reaction

6 A Simple Model for Light-Driven Water-Splitting Reaction [Pg.341]

To simplify the analysis, recombination in the space charge region is ignored, and surface electron-hole recombination is formulated in terms of the surface concentration of majority carriers present in the dark. Consider an n-type semiconductor electrode with a space charge region. If the diffusion length of holes, Lp, is much smaller than W, the flux of holes, Jp, into the surface under steady-state conditions is given by [cf. Equation (18.12)] [Pg.341]

depends on the electron concentration at the surface, which is determined by istpsc die potential drop, across the space charge region, a, the capture cross-section for recombination and t th the thermal velocity of electrons. [Pg.342]