Mid and far-infrared nanocrystals based photodetectors with enhanced performances

摘要

Disclosed is a plurality of metal chalcogenide nanocrystals coated with multiple organic and inorganic ligands; wherein the metal is selected from Hg, Pb, Sn, Cd, Bi, Sb or a mixture thereof; and the chalcogen is selected from S, Se, Te or a mixture thereof; wherein the multiple inorganic ligands includes at least one inorganic ligands are selected from S²⁻, HS⁻, Se²⁻, Te²⁻, OH⁻, BF₄⁻, PF₆⁻, Cl⁻, Br⁻, I⁻, As₂Se₃, Sb₂S₃, Sb₂Te₃, Sb₂Se₃, As₂S₃ or a mixture thereof; and wherein the absorption of the C—H bonds of the organic ligands relative to the absorption of metal chalcogenide nanocrystals is lower than 50%, preferably lower than 20%.