Controllable Synthesis and Properties of Sb₂Se₃ Nanorods Synthesized by Hot-Injection Method.

Antimony selenide (Sb₂Se₃) is an interesting p-type semiconductor with a proper bandgap for photovoltaic devices. In this work, Sb₂Se₃ nanorods with controllable length-width ratios were synthesized via hot-injection method, where selenium powder was used as selenium sources and oleylamine was selected as reducing agent and high-point solvent. X-ray diffraction (XRD) patterns and high resolution Transmission electron microscope (HRTEM) results demonstrate that nanorods are wellcrystallized single crystalline and grow along the [110] direction. The reaction temperatures were found to have a noticeable influence on the morphologies of Sb₂Se₃ nanorods. The growth mechanism of the nanorods was discussed based on scanning electron microscope (SEM) observations. Vis-NIR absorption spectra reveal that the bandgaps of nanorods were between 0.75 eV and 1.1 eV. Electrical conductivities in dark and light were also investigated.