An overview of metal hydroxyfluoride-A novel semiconductor material

Abstract

Semiconductors have been widely used in many high-tech fields such as photo- and electro-catalysis, ion batteries, and solar cells. In addition to the earliest discovered elemental and compound semiconductors, such as monocrystalline silicon and metal oxides, new types of compound semiconductors have been discovered. Among them, metal hydroxyfluorides (MOHF) are an emerging type of semiconductor that are easy to synthesize and inexpensive. However, many of their properties and applications are not well understood. Nevertheless, some MOHF materials, such as ZnOHF and CoOHF, have been sufficiently developed, and their applications have been extensively explored. This review focuses on a new compound semiconductor, MOHF, with ZnOHF and CoOHF as the typical. After a short introduction to their physical and chemical properties, their common applications are illustrated with several examples. Subsequently, other less-researched MOHF and MOHF-like materials, as well as their applications, are discussed. Moreover, the expectations and development directions of MOHFs are briefly summarized.

Keywords

Metal hydroxyfluoride / Semiconductor / Functional materials / Photocatalysts / Electrochemistry

Declaration of Competing Interest

Fenglong Wang is an editorial board member for ChemPhysMater and was not involved in the editorial review or the decision to publish this article. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

This work was supported by the Natural Science Foundation of Shandong Province (ZR2022MF311), Project of Innovation Team in Jinan City for Universities and Institutes (2021GXRC063), Natural Science and Development Foundation of Shenzhen (JCYJ20190807093205660), and Young Scholars Program of Shandong University (2018WLJH25).

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