Benefit of dual layer silicon nitride anti-reflection coating

Majority of commercial silicon solar cell technology around the world is based on screen print technology with or without a single or combined layer of titanium dioxide, silicon dioxide or recently PECVD silicon nitride. Most of the reported work on dual layer anti-reflection coating is based on two different materials. Less work has been done on dual layer silicon nitride for this purpose. In this work, a simple approach is presented to utilize dual layer silicon nitride. An improvement in weighted average reflectance has been achieved compared to single layer silicon nitride layer by this approach.