Patent ID: 9337363
Filing Date: 2016-05-10
CPC Classification: E04H,H01L,Y02E,Y02P,Y10T

Claim Text:
1. A photovoltaic cell comprising: a back contact; a silicon substrate disposed over a top surface of the back contact, wherein said silicon substrate includes a diode junction comprising a first substrate layer doped with a first dopant type on a second substrate layer doped with a second dopant type; an anti-reflective coating disposed directly on and in contact with a top surface of the silicon substrate, wherein the anti-reflective coating includes a plurality of gaps/openings extending through the antireflective coating to the top surface of the silicon substrate, light on a top surface of the anti-reflective coating being absorbed in said silicon substrate, thereby generating electron-hole pairs in said diode junction; and a top surface contact grid having a plurality of parallel metallic fingers and at least one elongated busbar intersecting the metallic fingers at a right angle, each metallic finger having a trapezoid-shaped cross section above the top surface of the anti-reflective coating, wherein a bottom of each of the plurality of parallel metallic fingers occupies a rectangular cross-section gap/opening through the anti-reflective coating and is in ohmic contact with said silicon substrate, and wherein the trapezoidal cross-section of each of the parallel metal fingers reflect light to the photovoltaic cell toward the anti-reflective coating.