Broadband Photodetectors: Broadband Photodetectors Enabled by Localized Surface Plasmonic Resonance in Doped Iron Pyrite Nanocrystals (Advanced Optical Materials 8/2018)

Charge carrier doped iron pyrite nanocubes (FeS2 NCs) exhibit strong localized surface plasmonic resonance (LSPR) spanning across ultraviolet through visible to near-infrared (UV-Vis-NIR). Using the printed LSPR FeS2 NCs/graphene van der Waals heterostructure, broadband UV-Vis-NIR photoresponsivity in exceeding 1.1 × 106 A/W has been demonstrated by Maogang Gong, Judy Z. Wu and co-workers (article number 1701241) through development of a ligand-exchange process to facilitate efficient charge transfer at the FeS2 NCs/graphene interface.