Water-soluble, heterometallic chalcogenide oligomers as building blocks for functional films

Abstract

Highly water-soluble, discrete, heterometallic, chalcogenide oligomers displaying various valences in a single metal chalcogenide oligomer are proposed for functional films.

Stable, carbon-free inks of Cu2ZnSnS4 nanoparticles synthesized at room temperature designed for roll-to-roll fabrication of solar cell absorber layers

“…S6, ESI). The formation of (Sn2S6) 4--complexes from excess tin and sulfur as shown previously 15,16 is likely responsible for the crystallite-clustering leading to the formation of larger particles. For samples with a reactant Cu/(Zn+Sn) ≥ 0.72, only crystallite sizes of above 3 nm are seen, with the predominant size around 4 nm (Fig.…”

“…15 Thiostannate complexes can form in a broad range of concentrations and pH levels, with (Sn2S6) 4mainly forming in alkaline solutions. 16 Both Zn/Sn-and Cu/(Zn+Sn)-ratios in the products correlate well with the reactant ratios, but with some dynamical trends. The largest variation in product composition is observed within the first 5 min.…”

“…Several groups have already identified various ions [12][13][14] and complexes 15 that can be used to stabilize CZTS NP inks in hydrophilic solvents. The effectiveness of this stabilization depends on the charge of these ions and complexes, which is determined by the pH of the solutions 16 .…”

Controlling 2D/2D Contacts in 2D TMDC Nanostructured Films for Solar-to-Hydrogen Conversion

“…In addition to Sb 2 S 3 , our metallic sulfide hard template contains Sn­(IV) cations. Importantly, while improving significantly the colloidal stabilization of the Sb 2 S 3 nanoparticles, we show that Sn­(IV) addition to the Sb 2 S 3 compound allows the generation of surface ligands able to interact with the TMDC nanosheet cations via the formation of Sn­(IV) chalcogenide surface ligands. − …”

Mo thio and oxo-thio molecular complexes film as self-healing catalyst for photocatalytic hydrogen evolution on 2D materials

“…While this work was focused on 2D WSe 2 materials which possess a considerable surface defect density, use of these highly interactive, oxo-thio, molecular complexes could be extended to passivate surface defects of a larger range of high surface area photo-electrodes like p-WS 2 or p-MoS 2 for the HER. Further developments could also be anticipated with the design of M doped-Mooxo-thio-complexes [59], where M= metallic cation [24], rare earth elements [60], especially to achieved lower cathodic HER onset potentials or higher catalytic activity in neutral aqueous electrolytes. Indeed, because of their ability to absorb a significant fraction of the solar spectrum using ultrathin films, 2D TMDC materials (p-MoS 2, p-WS 2, p-WSe 2 ) displaying various band gaps and onset potentials for HER [48] represent ideal photocathode candidates for the engineering of photoelectro-chemical tandem cells [61].…”