Segmented optical and electrical testing for photovoltaic devices

An apparatus for inducing a current in a solar cell substrate, the apparatus comprising:

• a substrate receiving surface for receiving the substrate,
• an array of a plurality of individually addressable light sources comprising pixels for illuminating the substrate in a sequenced manner, wherein the array of individually addressable light sources comprises a diffuse light source adjacent a liquid crystal display, where individual pixels of the liquid crystal display are individually addressable and operable to permit or prevent transmission of light from the diffuse light source in the sequenced manner,
• a sequencer for controlling the sequenced manner of illumination of the substrate by the array,
• a front side electrical contact for making electrical contact to a front side of the substrate,
• a back side electrical contact for making electrical contact to a back side of the substrate, and
• a meter electrically connected to the front side electrical contact and the back side electrical contact, the meter for sensing the current induced in the substrate during the sequenced illumination of the substrate.