|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Energy Technologies and CO2 Management Symposium
||Vertically Aligned Ferroelectric KNbO3 Nanowire Arrays for Solar Energy Conversion
||Shun Li, Boping Zhang, Federico Rosei
|On-Site Speaker (Planned)
Photoelectrochemical (PEC) water splitting is one of the most promising strategies to directly convert and store solar energy. Some pioneering efforts attempted to develop ferroelectric materials for solar energy conversion due to their efficient ferroelectric polarization-driven carrier separation, which can lead to higher energy conversion efficiencies. Herein, we demonstrate PEC property of ferroelectric KNbO3 nanowire array grown epitaxially on a Nb-doped SrTiO3 substrate. The charge transfer properties of the photoelectrodes can be effectively tuned by controlling the polarization state, thereby optimizing PEC performance. By manipulating the poling bias, we were able to tune the photocurrent density significantly. Our findings prove that the manipulation of internal fields through polarization is a promising strategy for the design of improved photoelectrodes for solar energy conversion.