The effects of inhomogeneous doping and/or composition profiles in the active regions of AlGaAs/GaAs heteroface solar cells have been studied using a realistic computer model. It is found that forn‐pdevices with moderate surface recombination velocitiesS, only modest improvements in the cell efficiency are obtained by including linear or exponential profiles. Such gradients become more valuable, however, whenever (1)Sincreases, (2) the solar illumination is increased through concentration, or (3) ap‐ndevice is desired.