Trace Cu–Te Co-regulation Decouples Charge and Phonon Transport in High-Performance n-Type Polycrystalline SnSe
High-performance n-type SnSe single crystals have been realized through extensive carrier and band-structure engineering, whereas n-type polycrystalline SnSe remains comparatively underdeveloped because native Sn vacancies favor p-type conduction and microstructural disorder further impedes electron transport. Here,...