| Autor: |
Polivtseva S; Department of Materials and Environmental Technology, TalTech, School of Engineering, Ehitajate tee 5, 19086 Tallinn, Estonia., Adegite JO; Mechanical Engineering Department, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA., Kois J; LLC Auramet, Kalliomäentie 1B, 02920 Espoo, Finland., Mamedov D; Department of Materials Science, National Research Nuclear University (MEPhI), 115409 Moscow, Russia.; Department for Solar Energy, Institute for Energy Technology, NO-2027 Kjeller, Norway., Karazhanov SZ; Department of Materials Science, National Research Nuclear University (MEPhI), 115409 Moscow, Russia.; Department for Solar Energy, Institute for Energy Technology, NO-2027 Kjeller, Norway., Maricheva J; Department of Materials and Environmental Technology, TalTech, School of Engineering, Ehitajate tee 5, 19086 Tallinn, Estonia., Volobujeva O; Department of Materials and Environmental Technology, TalTech, School of Engineering, Ehitajate tee 5, 19086 Tallinn, Estonia. |
| Abstrakt: |
The fabrication of cost-effective photostable materials with optoelectronic properties suitable for commercial photoelectrochemical (PEC) water splitting represents a complex task. Herein, we present a simple route to produce Sb 2 Se 3 that meets most of the requirements for high-performance photocathodes. Annealing of Sb 2 Se 3 layers in a selenium-containing atmosphere persists as a necessary step for improving device parameters; however, it could complicate industrial processability. To develop a safe and scalable alternative to the selenium physical post-processing, we propose a novel SbCl 3 /glycerol-based thermochemical treatment for controlling anisotropy, a severe problem for Sb 2 Se 3 . Our procedure makes it possible to selectively etch antimony-rich oxyselenide presented in Sb 2 Se 3 , to obtain high-quality compact thin films with a favorable morphology, stoichiometric composition, and crystallographic orientation. The treated Sb 2 Se 3 photoelectrode demonstrates a record photocurrent density of about 31 mA cm -2 at -248 mV against the calomel electrode and can thus offer a breakthrough option for industrial solar fuel fabrication. |
