THIN FILM PHOTOVOLTAIC CELL WITH BACK CONTACTS

摘要

Photovoltaic cells, photovoltaic devices, and methods of fabrication are provided. The photovoltaic cells include a transparent substrate to allow light to enter the photovoltaic cell through the substrate, and a light absorption layer associated with the substrate. The light absorption layer has opposite first and second surfaces, with the first surface being closer to the transparent substrate than the second surface. A passivation layer is disposed over the second surface of the light absorption layer, and a plurality of first discrete contacts and a plurality of second discrete contacts are provided within the passivation layer to facilitate electrical coupling to the light absorption layer. A first electrode and a second electrode are disposed over the passivation layer to contact the plurality of first discrete contacts and the plurality of second discrete contacts, respectively. The first and second electrodes include a photon-reflective material.

主权项

1. A photovoltaic cell comprising:
a substrate, the substrate being, at least in part, transparent to allow light to enter the photovoltaic cell through the substrate; a light absorption layer associated with the substrate, the light absorption layer having opposite first and second surfaces, the first surface being closer to the substrate than the second surface; a passivation layer disposed over the second surface of the light absorption layer; a plurality of first discrete contacts and a plurality of second discrete contacts, the plurality of first discrete contacts and the plurality of second discrete contacts both residing, at least in part, within the passivation layer, and facilitating electrical coupling to the light absorption layer; and a first electrode and a second electrode disposed over the passivation layer and comprising a photon reflective material, the first electrode contacting the plurality of first discrete contacts and the second electrode contacting the plurality of second discrete contacts.