Self-Patterned Nanoparticle Layers for Vertical Interconnects: Application in Tandem Solar Cells

Abstract

We demonstrate self-patterned insulating nanoparticle layers to define local electrical interconnects in thin-film electronic devices. We show this with thin-film silicon tandem solar cells, where we introduce between the two component cells a solution-processed SiO₂ nanoparticle layer with local openings to allow for charge transport. Because of its low refractive index, high transparency, and smooth surface, the SiO₂ nanoparticle layer acts as an excellent intermediate reflector allowing for efficient light management