Simple analytical models have been found that adequately describe the voltage behavior of both the stripe junction and the dot junction grating cells as a function of junction area. While the voltage in the former case is found to be insensitive to junction area reduction, significant voltage increases are shown to be possible for the dot junction cell. With regard to cells in which the junction area has been increased in a quest for better performance, it was found that (1) texturation does not affect the average saturation current densityJ0, indicating that the texturation process is equivalent to a simple extension of junction area by a factor of (3)1/2and (2) the vertical junction cell geometry produces a sizable decrease inJ0that, unfortunately, is more than offset by the effects of attendant areal increases.