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.