“…Currently, NIR-II SNCs are represented by I-VI (Ag 2 S, Ag 2 Se, Ag 2 Te), II-VI (CdTe, HgTe), IV-VI (PbS, PbSe, PbTe), and III-V (InP, InAs) binary compound semiconductors, as well as I-III-V (CuInSe 2 , AgInSe 2 ) ternary SNCs. [11,38,40] However, many of them contain highly toxic elements such as Cd, Hg, and Pb, which excludes their clinical use due to severe biosafety concerns. Thus, there is a high demand on biocompatible SNCs, Development of fluorophores with emission in the so-called second near-infrared window (NIR-II, 1000-1700 nm) represents an active area of the contemporary research.…”