Carrier density tuning in CuS nanoparticles and thin films by Zn doping via ion exchange

Abstract

Copper sulphide (covellite) nanoplatelets have recently emerged as a plasmonic platform in the near- infrared with ultrafast nonlinear optical properties. Here we demonstrate that the free-carrier density in CuS, which...

Plasmon-Induced Ultrafast Hot Hole Transfer in Nonstoichiometric CuxInyS/CdS Heteronanocrystals

“…The LSPR peak for CIS/CdS HNCs appears broader and red-shifted by ∼30 nm as compared to that of bare CIS. As the LSPR feature is sensitive to the environment, so the changes mentioned above in the plasmon peak for CIS/CdS may appear due to the variations in the surroundings or the carrier concentration after cation exchange . In addition to these changes observed in the NIR region, we also observed enhanced absorption in the visible region for the CIS/CdS HNCs.…”

Pre-phase transition of a Cu2−xS template enables polymorph selective synthesis of MS (M = Zn, Cd, Mn) nanocrystals via cation exchange reactions

“…It is worth noting that the reducing agent is necessary to break the disulfide (S-S) covalent bonds in covellite CuS prior to initiation of the reaction. [57][58][59][60][61] Nevertheless, the effect of the reducing agent on breaking of S-S bonds, that is the phase transition from covellite CuS into other Cu 2−x S phases ahead of the CE reaction, is scarcely investigated, which is highly important in the determination of the CE intermediates and final products. Therefore, it is fundamentally interesting to selectively reduce the CuS template into hcp type and ccp type Cu 2−x S for further polymorphic syntheses.…”

Copper diaryl-dithiocarbamate complexes and their application as single source precursors (SSPs) for copper sulfide nanomaterials

“…3 Â 10 27 m À3 is an excellent candidate for plasmonic applications in the near-infrared. [7][8][9] Due to their ease of formation from cheap and readily available starting materials, and the ability of dithiocarbamate (DTC) ligands to form stable complexes with all of the d-block elements, 10 DTC complexes have been extensively utilised as single source precursors (SSPs) towards transition metal sulfides. 11 Cu(II) bis(dialkylDTC) complexes, [Cu(S 2 CNR 2 ) 2 ], have been previously employed to prepare binary, tertiary and quaternary copper-containing sulfides, 11,12 and they are especially applicable to the preparation of quantum dots (QDs).…”