A Highly -Textured Sb2Se3 Photocathode for Efficient Photoelectrochemical Water Reduction
The anisotropic Sb2Se3 is an emerging earth-abundant photocathode for photoelectrochemical water splitting. However, controlling the growth of Sb2Se3 film with optimal  crystallographic orientation is still most challenging issue. Here, we successfully synthesized -oriented Sb2Se3 via a reliable and facile method. -oriented Sb2Se3 film can provide an excellent carrier-migration efficiency. Consequently, we achieved a record-high photocurrent density of -20.2 mA cm-2 at 0 VRHE and a very high half-cell solar-to-hydrogen efficiency of 1.36 % under 1-sun simulated solar illumination in TiO2/-Sb2Se3 photocathode. This work provides an effective strategy and important guidelines for rationally designing optoelectronic device basing on -oriented Sb2Se3 film.