Photoconducting red lead monoxide powder layers treated with a rhodamine B dye and deposited on interdigital electrodes are shown to have novel properties. The equilibrium dark current measured at 10 V may be reduced by applying a voltage pulse. Typically 200‐V pulses of 30 ms duration give a reduction of about 102times. The recovery from this nonequilibrium condition in the dark and under 600‐ nm illumination at intensities between 5×10−9and 5×10−7W/cm2is described. This behavior is discussed in terms of the depletion of grain‐grain contacts by the surrounding charge stored in surface states associated with the adsorbed dye molecules.