Antimony sulfide (Sb 2 S 3 ) has gathered great interest as a promising absorber material in new‐generation photovoltaic applications in recent years, due to its earth‐abundant composition and environmental compatibility. While the material has been extensively studied in detail in its bulk, crystalline form, obtaining Sb 2 S 3 in a colloidal form is challenging, although Sb 2 S 3 nanocrystals could enable low‐temperature processing from solution. Classical preparation methods routinely result in amorphous Sb 2 S 3 nanoparticles, which, due to their larger bandgap and poor crystalline ordering, are less interesting for optoelectronic applications. Modifying synthesis parameters to enhance crystallinity results in needle‐like crystallites >100 nm, unstable colloidal dispersions, and an incompatibility with solution‐processed optoelectronics. Here, we demonstrate a new, templated growth for Sb 2 S 3 nanocrystals leading to highly crystalline 1‐dimensional nanorods of exceptional quality and properties. We present the potential of such crystalline Sb 2 S 3 nanorods in solution‐processed planar nanocrystal solar cells. Such Sb 2 S 3 nanocrystal photovoltaic devices can be entirely processed at significantly lower deposition temperatures below 150°C and no longer rely on toxic cadmium sulfide interlayers as routinely used in bulk Sb 2 S 3 .
Prudnikau et al. (Wed,) studied this question.