What is HZB Perovskite Triple-Junction Solar Cell (GO/SAM Bilayer)?

This is a triple-junction solar cell that stacks three perovskite photoactive layers tuned to different segments of the solar spectrum to capture more sunlight than a single-junction cell can. Between the layers it uses a bilayer hole-transport interface combining graphene oxide with a self-assembled monolayer, which improves charge extraction and interface stability compared with a conventional single-layer monolayer contact alone.