A wireless, monolithic photovoltaic module. The module includes top and bottom, rectangular electrodes with a photovoltaic body and an adjacent insulating strip sandwiched in between the electrodes, the insulating strip being disposed proximate the edge of the bottom electrode. A bus bar overlies the insulating strip, but not the photovoltaic body, and is connected to a net of current carrying grid lines which overlie the photovoltaic body to form a current collector. A top encapsulating layer has diffractive grooves formed therein which overlie the grid lines to minimize shading effects otherwise caused by shadows from the grid lines.