FAR-INFRARED, THz NANOCRYSTALS, HETEROSTRUCTURED MATERIAL WITH INTRABAND ABSORPTION FEATURE AND USES THEREOF

摘要

A plurality of metal chalcogenide nanocrystals A_nX_m having an optical absorption feature above 12 μm and having a size superior to 20 nm. The metal A is selected from Hg, Pb, Ag, Bi, Cd, Sn, Sb or a mixture thereof. The chalcogen X is selected from S, Se, Te or a mixture thereof. The subscripts n and m are independently a decimal number from 0 to 5 and are not simultaneously equal to 0. Also, a method for manufacturing the plurality of metal chalcogenide nanocrystals A_nX_m, a material, a photoabsorptive film, a photoconductor, photodetector, photodiode or phototransistor, a device, the use of the plurality of metal chalcogenide nanocrystals, and a reflective or transmission filter.