Choongman Moon, Gihun Jung, Jihong Min and Byungha Shin*,
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Earth-Abundant Metal Oxides for Monolithic Tandem Photoelectrochemical Water Splitting Devices: Current Trends and Perspectives
Rather than supplying electrical power from a photovoltaic cell to a separate water electrolyzer, photoelectrochemical (PEC) water-splitting studies attempt to integrate key components into a single device for solar-driven hydrogen production. Despite the compact device architecture enhancing the cost-efficiency of solar-driven hydrogen production, the realization of PEC technology remains challenging. In this review, we focus on the physical properties of earth-abundant metal oxides and the choice of device architecture as key considerations for constructing a PEC device for practical hydrogen production. We introduce previous studies on BiVO4 to elaborate on various methods for facilitating the transport of charge carriers through metal oxides and their interface with an electrolyte. Furthermore, we discuss how the choice of PEC device structures affects the electrical and ionic charge transport and the usage of precious elements. Based on this discussion, we highlight a wireless monolithic tandem PEC device made up of earth-abundant elements and expatiate on practical aspects regarding the preparation and operation of such PEC devices.
期刊介绍:
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.