|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Materials for Energy Conversion and Storage 2022
||D-2: Crystal Facet-controlled SnS Photocathodes for Bias-free Photoelectrochemical Solar Water Splitting
||Hyungsoo Lee, Jaemin Park, Young Sun Park, Juwon Yun, Jooho Moon
|On-Site Speaker (Planned)
To achieve a high solar-to-hydrogen (STH) conversion efficiency, delicate strategies towards high photocurrent together with sufficient onset potential should be developed. Herein, we report a SnS semiconductor as a high-performance photocathode. Use of proper sulfur precursor having weak dipole moment allows us to obtain high-quality dense SnS nanoplates with enlarged favorable crystallographic facet, while surpressing inevitable anisotropic growth. Furthermore, the introducing Ga2O3 layer between SnS and TiO2 in SnS photocathodes efficiently improves the charge transport kinetics without charge trapping. The SnS photocathode reveals the highest photocurrent density of 28 mA cm−2 at 0 V versus the reversible hydrogen electrode. We for the first time demonstrate overall solar water splitting by combining the optimized SnS photocathode with a Mo:BiVO4 photoanode, achieving a STH efficiency of 1.7% and long-term stability of 24 h. High performance and low-cost SnS photocathode represents a promising new material in the field of PEC solar water splitting.
||Energy Conversion and Storage, Nanotechnology,