Colloidal Iron Pyrite (FeS_2) Nanocrystal Inks for Thin-Film Photovoltaics

摘要

Iron pyrite (FeS_2) is a promising earth-abundant semiconductor for thin-film solar cells. In this work, phase-pure, single-crystalline, and well-dispersed colloidal FeS_2 nanocrystals (NCs) were synthesized in high yield by a simple hot-injection route in octadecylamine and then were subjected to partial ligand exchange with octade-cylxanthate to yield stable pyrite NC inks. Polycrystalline pyrite thin films were fabricated by sintering layers of these NCs at 500-600 ℃ under a sulfuer atmosphere.