NOVELTY - A photovoltaic (PV) device comprises substrates arranged in a stack; and photovoltaic cell(s) formed between each of the substrates, where each of the substrates comprises interconnects configured to provide voltage on each side of each of the substrates.    USE - As photovoltaic device.    ADVANTAGE - The interconnection provides a PV device that is lighter, more flexible, cheaper, more robust and easier to manufacture. It allows for flex based, or other high density electronics, to be tightly interconnected to the PV device, organic light emitting diode (OLED), and/or battery. It also allows for adding electronics that can perform several functions such as power switching, peak power control, voltage regulation, timing/sequencing, and communications.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a method of operating a photovoltaic device comprising obtaining a first voltage between lower surfaces of two substrates (18, 26), where first photovoltaic cells are formed between the substrates; routing the first obtained voltage contacts through a first interconnect from the lower surface of the second substrate to an upper surface of the second substrate, such that the first voltage is derived from each of the photovoltaic cells; obtaining a second voltage between the lower surface of the second substrate and a lower surface of a third substrate, where second photovoltaic cells are formed between the second and third substrates; and routing the second obtained voltage contacts through a second interconnect from the lower surface of the third substrate to an upper surface of the third substrate, such that the second voltage is derived from each of the first photovoltaic cells; and    (2) a method of fabricating a photoelectric device comprising stacking cell modules, where each of the cell modules comprises solar cells; measuring an electrical performance of each of the solar cells; and interconnecting each of the cell modules based at least partially on the electrical performance of each of the solar cells, such that each of the cell modules comprises approximately the same current or voltage output.    DESCRIPTION OF DRAWING(S) - The figure is a cross-sectional view of a photovoltaic device having a stacked configuration.    PV modules (12, 14, 16)    Substrates (18, 26)