Fig. 1: Synthesis and characterization of Sb(SU)2Cl3.

a Schematic of the synthesis for the antimony chloride-N,N-dimethyl selenourea complex (Sb(SU)2Cl3). b Top view and side view for ESP and energy levels of Sb(SU)2Cl3. c FTIR spectrum and (d) XRD pattern of Sb(SU)2Cl3. e UV-vis absorption spectra of pure selenourea in ethyl acetate solution (SU-EAaq), Sb(SU)2Cl3 in ethyl acetate solution (Sb(SU)2Cl3-EAaq), and Sb(SU)2Cl3 in the solid-state thin film (Sb(SU)2Cl3-S).