Study shows performance of photodetector heterojunctions varies with carbon nanotube diameter

Junctions between the two different materials, single-wall carbon nanotubes (SWCNTs) and perovskite (CsPbBr3) quantum dots (QDs)—a mechanically stable and easily customized photovoltaic material that creates an electrical current from sunlight when paired with another material, such as SWCNTs—form semiconductor heterojunctions that work exceptionally well as a photodetector.