Figure 4.

Synthesis of MoS₂ films using organic additives. (a) Optical image of a 2 in.-sized MoS₂ wafer thin film from SCVD using (NH₄)₂MoS₄-DMF solution with additional amine- and amino alcohol-based solvents (n-butylamine and 2-aminoethanol). (b–d) AFM images of the different spin-coated precursor films with additive of (b) only DMF, (c) DMF:2-aminoethanol, and (d) DMF:n-butylamine:2-aminoethanol. Reproduced from ref (54). Copyright 2015 Royal Society of Chemistry. (e) Schematic of wet behavior of solution of (NH₄)₂MoS₄-EDTA-DMSO. (f) Mechanism for the synthesis of MoS₂ crystal. Reproduced from ref (57). Copyright 2017 Springer Nature. (g) Schematic illustration of the formation of MoS₂ thin film from the anhydrous ammonium tetrathiopolybdate (ATM) precursor and linear polyimide (L-PEI) complex film. (h) Image of a 6 in.-sized MoS₂ thin film synthesized through the method illustrate in (g). Reproduced from ref (38). Copyright 2017 American Chemical Society.